Phosphorus and sodium are essential nutrients in the diets of dogs and cats, playing crucial roles in maintaining various physiological functions. However, imbalances or excessive amounts of these minerals can lead to health issues such as kidney disease and hypertension. This study aims to evaluate the phosphorus and sodium contents in commercially available wet foods for dogs and cats, providing insights into their nutritional adequacy and potential health implications. A total of 100 wet food samples (50 for dogs and 50 for cats) from various popular brands were analyzed. The phosphorus and sodium levels were determined using inductively coupled plasma mass spectrometry (ICP-MS), ensuring precise and accurate measurements. The results were compared to the recommended dietary allowances established by the Association of American Feed Control Officials (AAFCO) and other relevant guidelines. The study underscores the importance of regular monitoring and accurate labeling of nutrient contents in commercial pet foods. Pet owners and veterinarians should be aware of the potential risks associated with high phosphorus and sodium intake, especially for pets with pre-existing health conditions. Manufacturers are encouraged to formulate balanced diets that meet nutritional requirements without exceeding safe levels of these critical minerals.

Phosphorus content, Sodium content, Commercial wet pet foods

Abdullahi, S. U., Osborne, C. A., Leininger, J. R., Fletcher, T. F., & Griffith,D. P. (1984). Evaluation of a calculolytic diet in female dogs with in‐duced struvite urolithiasis. American Journal of Veterinary Research,45, 1508–1519.

Alexander, J., Stockman, J., Atwal, J., Butterwick, R., Colyer, A., Elliott, D.,Gilham, M., Morris, P., Staunton, R., Renfrew, H., Elliott, J., & Watson,P. (2018). Effects of the long‐term feeding of diets enriched with in‐organic phosphorus on the adult feline kidney and phosphorus me‐tabolism. British Journal of Nutrition, 21, 1–21.

AOAC (2007). Official Methods of Analysis, 16th ed. Washington, DC:Association of Official Analytical Chemists.

Barber, P. J., Rawlings, J. M., Markweu, P. J., & Elliott, J. (1999). Effect ofdietary phosphate restriction on renal secondary hyperparathyroid‐ism in the cat. Journal of Small Animal Practice, 40, 62–70.

Bartges, J. W. (2012). Chronic kidney disease in dogs and cats. VeterinaryClinics of North America: Small Animal Practice, 42, 669–692.

Bonder, B. S., Halfen, D. P., Caragelasco, D. S., Pontieri, C. F. F., Jeremias,J. T., Kogika, M. M., & Brunetto, M. A. (2016). Influence of renal en‐riched diet in inflammatory profile and antioxidant capacity in dogs withchronic kidney disease. Chicago: WALTHAM International NutritionalSciences Symposium.

Böswald, L. F., Kienzle, E., & Dobenecker, B. (2018). Observation aboutphosphorus and protein supply in cats and dogs prior to the diagno‐sis of chronic kidney disease. Journal of animal physiology and animalnutrition, 102, 31–36.

Brown, S., Atkins, C., Bagley, R., Carr, A., Cowgill, L., Davidson, M., &Littman, M. (2007). Guidelines for the identification, evaluation, andmanagement of systemic hypertension in dogs and cats. Journal ofVeterinary Internal Medicine, 21, 542–558.

Brunetto, M., Caragelasco, D. S., Kogika, M. M., Halfen, D. P., Pontieri,C. F. F., Jeremias, J. T., & Sucupira, M. C. A. (2016). Evaluation ofphosphorus metabolism in dogs with chronic kidney disease underrenal diet: Serum parathormone and fibroblast growth factor 23(FGF‐23). Chicago: WALTHAM International Nutritional SciencesSymposium.

Buckley, C. M., Hawthorne, A., Colyer, A., & Stevenson, A. E. (2011).Effect of dietary water intake on urinary output, specific gravity andrelative supersaturation for calcium oxalate and struvite in the cat.British Journal of Nutrition, 106, 128–130.

Buranakarl, C., Mathur, S., & Brown, S. A. (2004). Effects of dietarysodium chloride intake on renal function and blood pressure incats with normal and reduced renal function. American Journal ofVeterinary Research, 65, 620–627.

Caputi, B. (2013). Compêndio Brasileiro de Alimentação Animal, 4th ed. SãoPaulo: Sindirações.

Chandler, M. L. (2008). Pet food safety: Sodium in pet foods. Topics inCompanion Animal Medicine, 23, 148–153.