Worldwide medical and scientific journal for animal health professionals
Veterinary Focus

Issue number 31.3 Nutrition

Calcium and phosphorus – getting the balance right

Published 14/09/2022

Written by Linda Böswald and Britta Dobenecker

Also available in Français , Deutsch , Italiano , Português , Română , Español and ภาษาไทย

It is critical to ensure that a puppy is neither over- nor under-supplied with certain nutrients and minerals during the growth phase, but this can be more difficult than it first appears, as discussed in this paper.

To help Max with his training, the owner should reward him with kibble taken from his calculated daily allowance

Key points

An adequate supply of calcium and phosphorus (both absolute and relative to each other) is crucial to ensure a dog’s healthy skeletal development.

Regular weighing and comparison with recommended growth curves is the gold standard to monitor optimal energy supply in puppies, as body condition scoring is not suitable. 

Calcium and phosphorus requirements for growing dogs depend on the expected mature body weight and age of the individual.

Excess protein intake in puppies does not cause problems, but energy supply should be restricted to ensure optimal growth rates and to help avoid developmental orthopedic disease.


Developmental orthopedic diseases (DODs) such as osteochondrosis, joint dysplasia, osteodystrophy or bone deformities are frequently seen in dogs, with fast-growing large and giant breeds being at particular risk. The maturation phase is a major life stage for all species, but is of critical importance in fast-growing young animals that have significant skeletal vulnerability during this period, and dogs come into this category. Feeding a balanced diet that provides adequate amounts of energy and nutrients is the basis for a healthy musculoskeletal system, as deficiencies can exacerbate some conditions that are not primarily nutrition-related. Signs of DOD can vary from mild and transient lameness through to severe movement disorders, and can also involve painful deviation of one or more limbs and swelling of the joints. Malnutrition in the first few months of life can lead to lifelong impairment of an animal´s health.

How much is too much?

A major problem when feeding a growing puppy is to determine the optimal amount of energy required for that individual. Excessive energy intake leads to an animal being acutely overweight (i.e., a growth rate that is faster than recommended), which places an additional burden on the growing skeleton 1. Even with some orthopedic disorders that have a hereditary basis, for example hip dysplasia (Figure 1), energy restriction at the puppy stage can reduce the prevalence of these conditions 2. It is now known that a puppy which grows rapidly due to excess energy intake has a much greater risk of being overweight or obese in adulthood 3. Several factors, such as breed, activity level, housing and health status, will influence daily energy requirements, so the required correct calorie level can therefore vary considerably between individuals. In adult dogs, the recommended way to monitor if excess or insufficient energy is being supplied is to use body condition scoring (BCS); identifying an adult dog with a high BCS and excess body fat will indicate that the animal’s diet has a disproportionately high energy content. This is not the case during the puppy stage, where a high-calorie diet can lead to an increased growth rate, and the dog can be overweight without having additional fat deposits. In fact, such puppies may even appear thin and undernourished, yet still weigh too much. The littermates in Figure 2 impressively demonstrate the impact of energy supply during growth: both dogs have the same body condition score, but the animal on the left, which received a higher energy intake from the age of 8 weeks onwards, is clearly larger yet still lean in appearance.

A radiograph showing severe bilateral hip dysplasia in a 14-month-old Hovawart

Figure 1. A radiograph showing severe bilateral hip dysplasia in a 14-month-old Hovawart. Although many orthopedic problems in young dogs have a hereditary basis, restricting energy intake at the puppy stage has been shown to reduce the incidence of such conditions. 
Credit: Shutterstock

An increased growth rate and the extra weight this brings represent additional stress for the developing skeleton, so the gold standard for determining an optimal growth rate is to monitor a puppy’s body weight through regular weighing (e.g., weekly) and compare with a growth chart 4. Optimal growth curves will differ depending on the anticipated ideal weight of the adult dog, therefore it is crucial to estimate this as accurately as possible. It is important to note that on-pack pet food recommendations for daily energy allowances can be rather high, and in addition calculating the calorie requirements using the 2006 equation from the US National Research Council (NRC) 5 will tend to give an overestimate. Recent studies have demonstrated significantly lower energy requirements in both growing colony dogs and household puppies 4,6 and the latest updated recommendations take this into account *. The average daily energy requirement (metabolizable energy, ME) for growing dogs can be estimated as follows 4:

ME intake [MJ] = (1.063-0.565 x [actual BW/expected mature BW]) x actual BW0.75


Two growing Foxhound-crossbred littermates

Figure 2. Two growing Foxhound-crossbred littermates; the male dog (right) had been fed with a dietary energy supply to allow for growth according to the recommended growth curve, whilst the female (left) was given a diet that had excess energy levels. The BCS in both cases was 5/9. 
Credit: B. Dobenecker

Dietary calcium and phosphorus

The two major constituents of bone, calcium and phosphorus, are linked by a functional and regulatory relationship, and are best considered together. The absolute requirements of both minerals, as well as the ratio (the recommended range is between 1:1 and 2:1), should be carefully calculated, as an excess or a deficiency of one or both minerals during the developmental phase can be a major factor in terms of nutritionally induced DODs. In retrospective evaluations of cases seen by the authors at Ludwig-Maximilian University, the majority of growing dogs with signs of DOD were found to have either an excessive or deficient intake of calcium and/or phosphorus, although interestingly the distribution has changed over the years. The first survey (in 1998) revealed that 61% of affected puppies had experienced a calcium excess and only 20% had a deficient intake of this element 1. A second survey in 2018 showed that the majority of DOD patients (58%) were fed a diet deficient in calcium, with only 21% of cases receiving excessive amounts of calcium prior to the orthopedic diagnosis 7.

It can be questioned as to why poor nutrition is such an issue for canine growth when it is much less of a problem in humans? One explanation is that in contrast to humans, maturation occurs much earlier in dogs, with almost the entire growth phase being realized within a single year. Consequently, even limited periods of inadequate nutrient supply pose a disproportionately greater risk for puppies than for children and teenagers. But another difference between dogs and other species such as humans must be taken into account: adaptive mechanisms to compensate for low or excessive calcium and phosphorus supply are virtually non-existent in the canine species 8. Rather than intestinal absorption of both minerals being the major regulatory pathway, the skeletal system is employed to store and mobilize calcium and phosphorus as necessary 9,10. Viewed from the idea that the canine species evolved as a predator, this makes perfect sense: either there was prey available, supplying abundant energy and minerals, or both energy and minerals were scarce, so that energy-dependent up-regulation of intestinal absorption was not feasible. This bone-based regulation is one factor in the development of clinical signs linked to calcium and phosphorus malnutrition in growing and adult dogs.

Britta Dobenecker

A number of factors, such as breed, activity level, housing and health status, influences daily energy requirements, so the required correct calorie level can therefore vary considerably between individuals.

Britta Dobenecker

Deficient calcium intake during the growth phase can cause secondary nutritional hyperparathyroidism, with reduced overall bone formation resulting in various clinical signs, including pathological fractures from normal physical exertion 11. In this context it is important to note that an increased fecal dry matter excretion (due either to a low dietary digestibility or a high food intake) also increases the fecal losses of calcium and phosphorus 12,13,14 and therefore increases the daily requirements for the minerals. As noted above, there is a considerable and increasing number of puppies diagnosed with DOD that are fed a calcium deficient diet. However, calcium excess receives more attention in the literature: several publications report that DOD can be caused experimentally in growing Great Danes by feeding excess dietary calcium 15,16 – although in most of these trials only the calcium supply was increased above the recommended intake; this led to reduced utilization of other elements crucial to skeletal development, such as phosphorus, zinc and copper. Consequently, such DODs may be caused, or at least be aggravated by, a secondary deficiency of these minerals, and in particular phosphorus 17. This tallies with the results of a study that examined the effects of excess dietary calcium when surplus phosphorus was also provided (to allow for a reduced digestibility of this element) in medium and large dog breeds, with no clinical signs of DOD being noted 18. On the contrary, a low phosphorus intake has been shown to have substantial (but reversible) adverse effects on skeletal health 19,20 (Figure 3) and other developmental disorders described in various case reports may also be linked to dietary phosphorus deficiency 21,22. It is also worth noting that, although supplying dietary protein at levels above the recommended daily allowance is often suspected to have a detrimental impact on skeletal development, this can be classified as a myth. Studies have demonstrated that the level of protein fed to growing dogs has no effect on their skeletal development 23,24.

A Foxhound-crossbred puppy after 6.5 weeks of low dietary phosphorus intake with bowed legs and splayed paws

Figure 3. A Foxhound-crossbred puppy after 6.5 weeks of low dietary phosphorus intake with bowed legs and splayed paws. The abnormalities were painless and completely reversible after a couple of weeks of adequate phosphorus supply. 
Credit: B. Dobenecker

How are daily nutrient requirements calculated?

When recommending daily allowances which will meet the requirements of the majority of the population, the basic approach is to determine the net requirements of each nutrient at various life stages, along with how bioavailability varies depending on the nutrient source. There are several ways to estimate these requirements. Experiments to study the dose-effect relationship of a particular nutrient can elucidate what happens with insufficient, adequate and excessive supply, but such trials need to be highly standardized, with careful selection of suitable target parameters to assess the effect of the nutrient being studied. For calcium and phosphorus, defining the parameters is rather difficult. On the one hand, there may be a prolonged latency period between onset of malnutrition and the appearance of specific clinical signs. The homeostasis of calcium and phosphorus is tightly controlled, so serum concentrations are maintained for a long time, even during severe deficiency. On the other hand, factors such as the ratio of dietary calcium to phosphorus, energy intake, growth rate and any genetic predisposition to skeletal disease are known to exacerbate the clinical signs. The calcium and phosphorus requirements for growing dogs, as defined by the NRC 5, are based on research using large and giant breeds and mainly in puppies younger than 6 months of age, with the trial data then extrapolated to cover the entire growth period of dogs of all sizes. The aim was to “meet or exceed” the requirement of all growing dogs, so it made sense to deduce the recommendations from the group with the highest requirement, i.e., young giant breed puppies. However, this method does not take into account individual differences, and the critical period of maximum growth intensity differs in duration between small and large breeds of dog. While large and giant breeds grow up to 12-15 months of age, small breeds may have reached their final bodyweight by 7-8 months, so extrapolation of data is likely to overestimate the requirement of small breeds. In addition, deducing the requirement with data from the early growth period will overestimate the requirement for the later period of growth, where daily gains have slowed.

Linda Böswald

The calcium and phosphorus requirements for growing dogs are based on research using large and giant breeds and mainly in puppies younger than 6 months of age, with the data generated from those trials being extrapolated to cover the complete growth period of dogs of all size groups.

Linda Böswald

Nutritional calculations

Another approach for determining the optimal daily supply of a nutrient is to perform a factorial calculation, which summates the required amounts for maintenance and performance. The advantage with this method is that it takes into account the precise individual requirements for a selected life stage, and it has been used successfully with farm animals, for example to determine the optimal rations for milk production in dairy cattle and for fattening pigs. In growing dogs, the factors to be determined are the tissue gain during growth and the maintenance requirement for the current body weight 25. The maintenance requirement is the amount of a nutrient needed to compensate for inevitable endogenous losses from feces, urine, sweat, skin, fur, etc.; when the endogenous losses are quantified, this gives the “net maintenance requirement” of a nutrient. However, because not 100% of the ingested amount of a nutrient are taken up by the body, the actual availability needs to be taken into account in order to obtain the “gross maintenance requirement” or feeding recommendation 26.

The equation is as follows:

Feeding recommendation for maintenance = e/availability [%] x 100

(where e = the endogenous losses)

Obviously, the overall feeding recommendation is strongly influenced by the availability of a nutrient; if the average availability is reduced by half, the feeding recommendation doubles. Mineral availability differs between sources and overall diet composition, so to ensure adequate intake levels a safety margin is built into the average availability.

Tissue gain during growth requires an additional nutrient allowance to be factored into the equation, as follows;

Net requirement for growth = average daily gain x nutrient concentration in gained tissue

So the feeding recommendation for growth can be calculated from this, as follows;

(e + net requirement for growth)/availability [%] x 100

The canine species shows a uniquely high variation in body size and weight, so to generate the growth curve for an individual puppy it is important to have a good estimate of its future adult body weight (based on the ideal weight of the same-sex parent or, if this is not available, mean weight according to breed standard). There are also differences in growth rate between small, medium, large and giant breeds, so it is necessary to categorize dogs on their adult body weight to better define recommendations for calcium and phosphorus supply. In addition, since growth is not a linear process, using age groups allows further differentiation for the recommendations. The percentage requirement for tissue gain is highest during early growth; this then declines as the dog approaches its adult body weight and the maintenance requirement accounts for most of the total energy and nutrient requirements. The factorial calculation for calcium and phosphorus needs to take both aspects into consideration.

There are different ways to express feeding recommendations. The NRC supplies the values in relation to metabolizable energy (ME). The absolute value calculated using this reference depends on the energy requirement, which may differ considerably from the average for an individual case. It can be predicted, for example, that a Newfoundland puppy will have a lower ME requirement than a Great Dane puppy of the same age and body weight due to differences in temperament and activity. As an alternative to the reference ME, it is possible to relate the recommended daily intake to metabolic body weight (kg0.75). This has the advantage of calculating the exact requirements – and hence enabling a precisely balanced diet – for an individual dog, but it does not directly inform about the required nutrient content in a diet. This needs to be calculated for each case using the individual ME requirement.

The calcium and phosphorus recommendations for various ages and mature body weight groups required for the calculations are given in Table 1, and a worked example for a young puppy fed a commercial diet can help explain the different steps (Box 1).

Table 1. Requirement for calcium and phosphorus for growing dogs relative to metabolic body weight (kg0.75) (adapted from 26).

Mature body weight (kg) 10 35 60
Current age (weeks) Calcium (mg/kg0.75)
9 550 - -
13 436 634 776
17 361 512 610
22 339 479 565
26 335 466 542
31 316 444 519
35 251 350 405
39 217 300 348
44 213 294 342
48 193 266 306
52 187 258 296
Current age (weeks) Phosphorus (mg/kg0.75)
9 352 - -
13 197 291 362
17 158 225 269
22 151 213 251
26 152 210 244
31 141 196 227
35 124 172 197
39 121 166 190
44 125 171 196
48 116 158 180
52 114 155 177


Box 1. Calculating the required calcium (Ca) and phosphorus (P) levels for “Max”, a 22-week-old German Shepherd puppy with a current body weight of 20 kg and an estimated adult body weight of 35 kg.

For Max at 22 weeks and with a predicted mature body weight of 35 kg, Table 1 provides a daily recommendation of 479 mg Ca/kg0.75 and 213 mg P/kg0.75. Using his current weight of 20 kg, the absolute calcium and phosphorus requirements are calculated as follows:
  • Recommended daily Ca intake: 479 mg x 200.75 kg = 479 mg x 9.46 kg = 4,530 mg (or 4.5 g)
  • Recommended daily P intake: 213 mg x 200.75 kg = 213 mg x 9.46 kg = 2,014 mg (or 2.0 g)
If using a commercial dry diet, it is essential to check whether the calcium and phosphorus content of the chosen diet is adequate for the puppy at his current growth period. Assuming a daily energy requirement of 7.0 MJ ME (1,673 kcal) 4, the required mineral content in the diet can be calculated as follows:
  • Calcium content 4.5 g/7 MJ ME = 0.64 g Ca per MJ ME (2.69 g Ca/1000 kcal ME)
  • Phosphorus content 2.0 g/7 MJ ME = 0.29 g P per MJ ME (1.20 g P/1000 kcal ME)
The owner has chosen a balanced, complete dry diet for growing large breed dogs which contains 1.6 MJ ME (382 kcal) per 100 g, 1.1% calcium and 0.7% phosphorus, with a Ca:P ratio of 1.6:1. The first step is to calculate the daily amount of the diet that will provide the ME requirement for Max, as follows; 
  • 7 MJ ME/1.6 MJ ME x 100 g = 438 g
The calcium and phosphorus supplied with this amount of diet then needs to be compared to the requirement. This can be calculated either relative to the dietary ME content (i), or as absolute values for the individual dog (ii). 
(i) Relative to ME, the mineral content is calculated as follows:
  • 1.1 g Ca per 100 g -> 1.1 g Ca/1.6 MJ ME = 0.68 g Ca/MJ ME (2.88 g Ca/1000 kcal ME)
  • 0.7 g P per 100 g -> 0.7 g P per 1.6 MJ ME = 0.43 g P/MJ ME (1.83 g P/1000 kcal ME)
So the diet in this example meets the required levels of calcium and phosphorus per MJ ME (as calculated in step 2).
(ii) Alternatively, the absolute dietary supply with both minerals can be calculated as follows:
  • 1.1% Ca in 438 g diet -> 1.1 x 438/100 = 4.818 g calcium supplied with this amount
  • 0.7% P in 438 g diet -> 0.7 x 438/100 = 3.066 g phosphorus supplied with this amount
The values should be compared to the absolute requirement for Max (as calculated in step 1) and can be seen to be met in this case.
For the feeding routine, the daily ration can be weighed out and kept in a small container; this means that should the owner want to give Max treats for training, kibble from the measured portion can be used without the risk of additional energy supply (Figure 4). 
To help Max with his training, the owner should reward him with kibble taken from his calculated daily allowance

Figure 4. To help Max with his training, the owner should reward him with kibble taken from his calculated daily allowance. 
Credit: Shutterstock 

Should an owner wish to feed a homemade diet, it must be appreciated that most recipes need to be supplemented with minerals and vitamins to meet the daily requirements, and because there are various supplements available, the nutrient supply from all components of the diet must be added together and compared to the requirement to allow selection of a suitable product (Figure 5). An example of a homemade ration is shown in Table 2, from which it can be seen that 20 g of a mineral supplement which contains 22.5% calcium and 10.5% phosphorus will meet the daily recommended allowance for these minerals. Note also that the dietary Ca/P ratio at 1.3/1 is in the ideal range (recommended range 1/1-2/1). However, in order to meet the requirements, the amount of daily supplement offered must be increased if the nutrient concentration is lower, or decreased if the nutrient supply is higher.

Table 2. A potential homemade diet formulated to meet the requirement of a 22-week-old German Shepherd puppy currently weighing 20 kg and with an estimated mature bodyweight of 35 kg.

Feed item Amount [g/d]
Beef 600 4.8 24 1188
Cooked potatoes
250 0.5 15 115
Vegetables 100 0.2 34 30
Fruit  100 0.2 11 16
Plant oil 15 0.5 0 0
Fish oil 5 0.2 0 0
Dried tripe as chew 30 0.6 27 54
Supplement  20 0 4500 2100
Total in ration 7.0 4611 3503
Recommended intake 7.0 4530 2014
There are a bewildering number of multivitamin and mineral supplements available, and the veterinarian should guide the owners to select a product appropriate to their dog’s needs

Figure 5. There are a bewildering number of multivitamin and mineral supplements available, and the veterinarian should guide the owners to select a product appropriate to their dog’s needs.
Credit: B. Dobenecker


Metabolizable energy and nutrient requirements change during growth, so a proper overview of a puppy’s nutritional requirements requires regular ration adaptations. Whilst two-monthly reviews are supposedly adequate for dogs growing according to the recommended growth curve, all puppies should be weighed weekly, and the body weight compared to the optimal growth curve to monitor progress. If there is a deviation from the ideal body weight, the diet – and especially the ME supplied – needs to be adapted immediately. For simplicity, this article considers only metabolizable energy, calcium and phosphorus, but in general the requirement for all minerals, trace elements and vitamins should be included when reviewing the nutritional needs of a patient, and whilst the calculations are not difficult, they do illustrate that consideration of all the factors required to achieve a balanced diet is necessary.


  1. Dobenecker B, Kienzle E, Köstlin R, et al. Mal‐ and over-nutrition in puppies with or without clinical disorders of skeletal development. J. Anim. Physiol. Anim. Nutr. 1998;80(1‐5):76-81.

  2. Kealy RD, Olsson SE, Monti KL, et al. Effects of limited food consumption on the incidence of hip dysplasia in growing dogs. J. Am. Vet. Med. Assoc. 1992;201:857-857.

  3. German AJ. Promoting healthy growth in pets. (Abstract) International Nutritional Science Symposium, Atlanta, USA, 2016.

  4. Klein C, Thes M, Böswald LF, et al. Metabolisable energy intake and growth of privately owned growing dogs in comparison with official recommendations on the growth curve and energy supply. J. Anim. Physiol. Anim. Nutr. 2019;103(6):1952-1958.

  5. National Research Council (NRC). Nutrient Requirements of Dogs and Cats. National Academic Press, Washington D.C. 2006

  6. Dobenecker B, Endres V, Kienzle E. Energy requirements of puppies of two different breeds for ideal growth from weaning to 28 weeks of age. J. Anim. Physiol. Anim. Nutr. 2013;97(1):190-196.

  7. Böswald L, Elmiger C, Dobenecker B. Nährstoffversorgung in der Aufzucht von Hunden – tierschutzrelevante Befunde und Fallbeispiele. In Proceedings, DVG Tierschutztagung München 2018.

  8. Mack JK, Alexander LG, Morris PJ, et al. Demonstration of uniformity of calcium absorption in adult dogs and cats. J. Anim. Physiol. Anim. Nutr. 2015;99(5):801-809.

  9. Böswald LF, Dobenecker B, Clauss M, et al. A comparative meta‐analysis on the relationship of faecal calcium and phosphorus excretion in mammals. J. Anim. Physiol. Anim. Nutr. 2018;102(2):370-379.

  10. Schmitt S, Mack J, Kienzle E, et al. Faecal calcium excretion does not decrease during long‐term feeding of a low‐calcium diet in adult dogs. J. Anim. Physiol. Anim. Nutr. 2018;102(2):e798-e805

  11. Becker N, Kienzle E, Dobenecker B. Calcium deficiency: a problem in growing and adult dogs: two case reports. Tierarztliche Praxis. Ausgabe K, Kleintiere/heimtiere 2012;40(2):135-139.

  12. Kienzle E, Dobenecker B, Wichert B, et al. Effect of fecal water and dry matter excretion on fecal mineral excretion in dogs studied in a fiber model. J. Nutr. 2006;136(7):2001S-2003S.

  13. Kienzle E, Brenten T, Dobenecker B. Impact of faecal DM excretion on faecal calcium losses in dogs eating complete moist and dry pet foods – food digestibility is a major determinant of calcium requirements. J. Nutr. Sci. 2017;6(3):1-3.

  14. Kienzle E, Hofmann C, Dobenecker B. The increase of faecal calcium excretion with increasing faecal dry matter excretion in dogs is an independent per se effect of faecal dry matter excretion. In: Proceedings, Congress of the European Society of Veterinary and Comparative Nutrition Turin, Italy, 2019.

  15. Hazewinkel HAW, Goedegebuure SA, Poulos PW, et al. Influences of chronic calcium excess on the skeletal development of growing Great Danes. J. Am. Anim. Hosp. Assoc. 1985;135:305-310.

  16. Schoenmakers I, Hazewinkel HAW, Voorhout G, et al. Effect of diets with different calcium and phosphorus contents on the skeletal development and blood chemistry of growing Great Danes. Vet. Rec. 2000;147(23):652-660.

  17. Dobenecker B. Factors that modify the effect of excess calcium on skeletal development in puppies. Br. J. Nutr. 2011;106(S1):S142-S145.

  18. Dobenecker B, Kasbeitzer N, Flinspach S, et al. Calcium‐excess causes subclinical changes of bone growth in Beagles but not in Foxhound‐crossbred dogs, as measured in X‐rays. J. Anim. Physiol. Anim. Nutr. 2006;90(9‐10):394-401.

  19. Kiefer‐Hecker B, Kienzle E, Dobenecker B. Effects of low phosphorus supply on the availability of calcium and phosphorus, and musculoskeletal development of growing dogs of two different breeds. J. Anim. Physiol. Anim. Nutr. 2018;102(3):789-798.

  20. Kiefer‐Hecker B, Bauer A, Dobenecker B. Effects of low phosphorus intake on serum calcium, phosphorus, alkaline phosphatase activity and parathyroid hormone in growing dogs. J. Anim. Physiol. Anim. Nutr. 2018;102(6):1749-1758.

  21. Fritz J, von Rosenberg S, Bensinger K, et al. Two cases of malnutrition associated with locomotor problems in growing puppies without alterations of x-ray density of long bones. In: Proceedings, Congress of the European Society of Veterinary and Comparative Nutrition, Vienna, Austria, 2008.

  22. Cetinkaya MA, Yardimci C, Sağlam M. Carpal laxity syndrome in forty-three puppies. Vet. Comp. Orthop. Traumatol. 2007;2(02):126-130.

  23. Nap, RC, Hazewinkel HA, Voorhout G, et al. Growth and skeletal development in Great Dane pups fed different levels of protein intake. J. Nutr. 1991;121(suppl_11):S107-S113.

  24. Nap RC, Hazewinkel HA, Voorhout G, et al. The influence of the dietary protein content on growth in giant breed dogs. Vet. Comp. Orthop. Traumatol. 1993;6(01):1-8.

  25. Kienzle E, Zentek J, Meyer H. Body composition of puppies and young dogs. J. Nutr. 1998;128(12):2680S-2683S. 

  26. Böswald LF, Klein C, Dobenecker B, et al. Factorial calculation of calcium and phosphorus requirements of growing dogs. PLOS One 2019;14(8):e0220305

Linda Böswald

Linda Böswald

Dr. Böswald studied veterinary medicine at Munich’s Ludwig-Maximilian University and remained there after qualifying to specialize in animal nutrition Read more

Britta Dobenecker

Britta Dobenecker

After graduating from Hannover’s School of Veterinary Medicine, Dr. Dobenecker studied for a doctoral thesis at the Institute of Physiological Chemistry in Hannover and the Institute of Animal Nutrition in Mun Read more

Other articles in this issue

Issue number 31.3 Published 06/10/2022

Individualized pet nutrition

This short paper explains why individualized nutrition is important for an animal’s health, how new technology now allows tailor-made nutritional solutions for pets, and the benefits it brings.

By Emmanuelle Sagols and Sally Perea

Issue number 31.3 Published 05/10/2022

Sustainable sourcing of omega-3 (EPA/DHA) for cats and dogs

Research has achieved a novel method of obtaining omega-3 fatty acids for inclusion in pet foods, as this short paper describes.

By Taoufiq Errafi

Issue number 31.3 Published 24/08/2022

Pet obesity: new challenges, new solutions

Obesity in our pets is nothing new – but Alex German offers some new ideas as to how the problem can be best tackled.

By Alexander J. German

Issue number 31.3 Published 17/08/2022

FAQs about cat nutrition

The feline species is unique in many ways, and none more so than in its nutritional requirements, as illustrated in this question-and-answer paper from Ana Lourenço.

By Ana Luísa Lourenço