BARFLAB does not guess. Every standard, every safety limit and every sentence in the knowledge base has a source — nutritional guidelines (NRC, AAFCO, FEDIAF), public food-composition databases and peer-reviewed research. Below is the full list; under each entry we note briefly what we use it for.
Food composition databases
Nutrient values for products in the catalog come from public food composition databases — each product cites the database its data came from.
- USDA FoodData Central (USA). fdc.nal.usda.gov
- CIQUAL — ANSES (France). ciqual.anses.fr
- DTU Frida (Denmark). frida.fooddata.dk
- Matvaretabellen (Norway). matvaretabellen.no
- AFCD — Australian Food Composition Database. foodstandards.gov.au
- Fineli (Finland). fineli.fi
All cited sources
- AAFCO. Reading Labels. aafco.org
Basis for AAFCO’s US nutrient profiles and reading values on a dry-matter basis - Amundson LA, Kirn BN, Swensson EJ, Millican AA, Fahey GC (2024). Copper metabolism and its implications for canine nutrition. Translational Animal Science. pmc.ncbi.nlm.nih.gov
Source on copper metabolism and dietary sources for dogs and cats - Anderson PJB, Rogers QR, Morris JG (2002). Cats Require More Dietary Phenylalanine or Tyrosine for Melanin Deposition in Hair than for Maximal Growth. J Nutr 132(7):2037-2042. doi.org
Backs the role of phenylalanine/tyrosine in melanin deposition and dark-coat fading in cats - Assessment of mineral adequacy in preprepared raw dog foods labeled as complete (2025). Scientific Reports. pmc.ncbi.nlm.nih.gov
Data on adequacy and dietary sources of iodine and manganese in raw diets for dogs and cats - Association of American Feed Control Officials. AAFCO Dog and Cat Food Nutrient Profiles. aafco.org
Basis for AAFCO profiles with minimums and maximums used by the diet generator - Axelsson E, Ratnakumar A, Arendt ML, et al. (2013). The genomic signature of dog domestication reveals adaptation to a starch-rich diet — amplification of the amylase gene (AMY2B) in the dog. Nature 495:360–364. doi.org
Supports dogs’ adaptation to a starch-rich diet and the lack of an essential carbohydrate requirement - Bai SC, Sampson DA, Morris JG, Rogers QR (1989). Vitamin B-6 requirement of growing kittens. Journal of Nutrition 119(7):1020-7. pubmed.ncbi.nlm.nih.gov
Basis for vitamin B6 requirement and its role in protein and amino-acid metabolism - Batt RM, Morgan JO (1982). Role of serum folate and vitamin B12 concentrations in the differentiation of small intestinal abnormalities in the dog. Research in Veterinary Science 32(1):17-22. pubmed.ncbi.nlm.nih.gov
Source on folate (B9) and the rarity of its deficiency on a raw diet - Bauer JE (2004). Lipoprotein-mediated transport of dietary and synthesized lipids and lipid abnormalities of dogs and cats. JAVMA 224(5):668-675. doi.org
Supports that dietary cholesterol is safe in dogs and cats, unlike in humans - Bauer JE (2006). Metabolic basis for the essential nature of fatty acids and the unique dietary fatty acid requirements of cats. JAVMA 229(11):1729-1732. doi.org
Basis for the essential nature of fatty acids, including cats’ unique arachidonic acid requirement - Bauer JE (2008). Essential fatty acid metabolism in dogs and cats. Revista Brasileira de Zootecnia. doi.org
Source on essential fatty acid metabolism and dietary sources in dogs and cats - Bauer JE (2011). Therapeutic use of fish oils in companion animals. JAVMA 239(11):1441–1451. doi.org
Basis for therapeutic fish-oil use and the bleeding/digestive risks of excess EPA/DHA - Bauer JE (2016). The essential nature of dietary omega-3 fatty acids in dogs. JAVMA 249(11):1267-1272. doi.org
Supports the essential nature of omega-3 and the pro-inflammatory risk of a high LA:ALA ratio - Bauer JE, Dunbar BL, Bigley KE (1998). Dietary flaxseed in dogs results in differential transport and metabolism of (n-3) polyunsaturated fatty acids. doi.org
Backs poor ALA-to-EPA/DHA conversion in dogs and its inhibition by excess LA - Bijsmans ES, Quéau Y, Feugier A, Biourge VC (2021). The effect of urine acidification on calcium oxalate relative supersaturation in cats. pubmed.ncbi.nlm.nih.gov
Basis for the effect of sulfur amino acids on urine acidification in cats - Bognár, A. (2002). Tables on Weight Yield of Food and Retention Factors of Food Constituents for the Calculation of Nutrient Composition of Cooked Foods (Dishes). Bundesforschungsanstalt für Ernährung. publikationen.bibliothek.kit.edu
Source of weight-yield and cooking-loss factors used for cooked diets - Bol S, Bunnik EM (2015). Lysine supplementation is not effective for the prevention or treatment of feline herpesvirus 1 infection in cats: a systematic review. BMC Vet Res 11:284. doi.org
Backs the ineffectiveness of lysine supplementation against feline herpesvirus - Brons AK, Henthorn PS, Raj K, et al. (2013). SLC3A1 and SLC7A9 Mutations in Autosomal Recessive or Dominant Canine Cystinuria: A New Classification System. J Vet Intern Med 27(6):1400-1408. doi.org
Basis for the genetic predisposition to cystinuria in certain dog breeds - Brown SA, Brown CA, Crowell WA, et al. (2000). Effects of dietary polyunsaturated fatty acid supplementation in early renal insufficiency in dogs. J Lab Clin Med 135(3):275–286. pubmed.ncbi.nlm.nih.gov
Backs that excess ARA without omega-3 worsens inflammation and kidney damage in dogs - Buckley CMF, Hawthorne A, Colyer A, Stevenson AE (2011). Effect of dietary water intake on urinary output, specific gravity and relative supersaturation for calcium oxalate and struvite in the cat. British Journal of Nutrition 106(Suppl 1):S128–30. pubmed.ncbi.nlm.nih.gov
Basis for the effect of water intake on urine dilution and urolith risk in cats - Burron S, Richards T, et al. (2024). The balance of n-6 and n-3 fatty acids in canine, feline, and equine nutrition: exploring sources and the significance of alpha-linolenic acid. J Anim Sci. doi.org pmc.ncbi.nlm.nih.gov
Basis for the target omega-6:3 ratio and the significance of ALA versus animal EPA/DHA - Butawan M, Benjamin RL, Bloomer RJ (2017). Methylsulfonylmethane: Applications and Safety of a Novel Dietary Supplement. Nutrients 9(3):290. pmc.ncbi.nlm.nih.gov
Source on sulfur, MSM, and the safety of its supplementation - Böswald LF, Klein C, Dobenecker B, Kienzle E (2019). Factorial calculation of calcium and phosphorus requirements of growing dogs. PLoS ONE. doi.org
Basis for calculating calcium and phosphorus requirements and the danger of a meat-only diet - Chamberlin AJ, Bauer JE (2014). Dietary gamma-linolenic acid supports arachidonic acid accretion and associated Δ-5 desaturase activity in feline uterine but not ovarian tissues (cats have insufficient Δ-6 desaturase activity). Journal of Nutritional Science 3:e43. pmc.ncbi.nlm.nih.gov
Backs cats’ insufficient desaturase activity and their dependence on preformed ARA - Cornell University College of Veterinary Medicine, Riney Canine Health Center. Risks from a fractured tooth. vet.cornell.edu
Basis for the tooth-fracture risk from bones when switching to a BARF diet - de Godoy MRC, et al. Fermentable soluble fibres spare amino acids in healthy dogs fed a low-protein diet (comparison of soluble and insoluble fiber). PLoS ONE, 2016. pmc.ncbi.nlm.nih.gov
Backs the difference between soluble and insoluble fiber in the canine gut - Delaney SJ, Dzanis DA (2018). Safety of vitamin K, and its use in pet foods. JAVMA 252(5):537-542. doi.org
Basis for the role and safety of vitamin K in blood clotting and calcium metabolism - DeNapoli JS, Dodman NH, Shuster L, Rand WM, Gross KL (2000). Effect of dietary protein content and tryptophan supplementation on dominance aggression, territorial aggression, and hyperactivity in dogs. J Am Vet Med Assoc 217(4):504-508. pubmed.ncbi.nlm.nih.gov
Source on the effect of tryptophan on mood and behavior in dogs - Dietary Fiber: Optimizing Gastrointestinal Health (proceedings). dvm360 — fermentation of fiber to SCFA and their energy contribution; butyrate as fuel for colonocytes. dvm360.com
Backs the fermentation of fiber to SCFA and butyrate as fuel for colonocytes - Dirksen K, Fieten H (2017). Canine Copper-Associated Hepatitis. Veterinary Clinics of North America: Small Animal Practice. pubmed.ncbi.nlm.nih.gov
Supports the mechanism of hepatic excretion of excess copper via bile in dogs - Doi M, Yamaoka I, Fukunaga T, Nakayama M (2003). Isoleucine, a potent plasma glucose-lowering amino acid, stimulates glucose uptake in C2C12 myotubes. Biochem Biophys Res Commun 312(4):1111-1117. pubmed.ncbi.nlm.nih.gov
Backs isoleucine’s role as a BCAA in glucose uptake and metabolism - Domosławska A, Zduńczyk S, Janowski T, Jurczak A (2013). Folic acid supplementation decreases cleft palate incidence in Pug and Chihuahua puppies. pubmed.ncbi.nlm.nih.gov
Supports folic acid’s role in fetal development and prevention of cleft palate - Domínguez-Oliva A, Mota-Rojas D, Semendric I, Whittaker AL (2023). The Impact of Vegan Diets on Indicators of Health in Dogs and Cats: A Systematic Review. Veterinary Sciences 10(1):52. mdpi.com
Source on protein and the impact of diet on health indicators in dogs and cats - Dow SW, LeCouteur RA, Fettman MJ, Spurgeon TL (1987). Potassium depletion in cats: hypokalemic polymyopathy. JAVMA 191(12. pubmed.ncbi.nlm.nih.gov
Documents the effects of potassium deficiency (hypokalemic myopathy) in cats - dvm360. Hyperlipidemia in dogs and cats (dogs/cats transport cholesterol in HDL, low risk of atherosclerosis; atherosclerosis mainly secondary with hypothyroidism/diabetes. dvm360.com
Justifies the safety of cholesterol and saturated fats in dogs and cats given HDL transport and low atherosclerosis risk - Edinboro CH, Scott-Moncrieff JC, Glickman LT (2010). Feline Hyperthyroidism: Potential Relationship with Iodine Supplement Requirements of Commercial Cat Foods. pmc.ncbi.nlm.nih.gov
Supports the low tolerance for excess iodine and its link to feline hyperthyroidism - Eisert R (2011). Hypercarnivory and the brain: protein requirements of cats reconsidered. Journal of Comparative Physiology B 181(1):1–17. link.springer.com
Source on the elevated protein requirement of cats as obligate hypercarnivores - Farrow HA, Rand JS, Morton JM, O’Leary CA, Sunvold GD (2013). Effect of Dietary Carbohydrate, Fat, and Protein on Postprandial Glycemia and Energy Intake in Cats. Journal of Veterinary Internal Medicine 27(5):1121–1135. onlinelibrary.wiley.com
Backs the effect of excess dietary carbohydrate on postprandial glycemia in cats - Faure M, Moënnoz D, Montigon F, Mettraux C, Breuillé D, Ballèvre O (2005). Dietary threonine restriction specifically reduces intestinal mucin synthesis in rats. J Nutr 135(3):486-491. pubmed.ncbi.nlm.nih.gov
Supports threonine’s role in mucin synthesis and protection of intestinal mucosa - FEDIAF (2021). Nutritional Guidelines for Complete and Complementary Pet Food for Cats and Dogs. europeanpetfood.org
Primary nutrient-standard source (FEDIAF) underpinning the BARFLAB standard, Score and Ca:P ratio - Frigg M, Schulze J, Volker L (1989). Clinical study on the effect of biotin on skin conditions in dogs. Schweizer Archiv für Tierheilkunde 131(10):621-5. pubmed.ncbi.nlm.nih.gov
Documents the effects of biotin deficiency on skin, coat and claws in dogs - Funaba M, Yamate T, Narukawa Y, Gotoh K, Iriki T, Hatano Y, Abe M (2001). Effect of supplementation of dry cat food with D,L-methionine and ammonium chloride on struvite activity product and sediment in urine. J Vet Med Sci 63(3):337-339. doi.org
Supports methionine’s role in urine acidification and struvite prevention - Garcia-Mazcorro JF, et al. Molecular assessment of the fecal microbiota in healthy cats and dogs before and during supplementation with fructo-oligosaccharides (FOS) and inulin. 2017. pmc.ncbi.nlm.nih.gov
Source on soluble fiber (FOS/inulin) and its effect on the gut microbiota - Gershoff SN, Faragalla FF, Nelson DA, Andrus SB (1959). Vitamin B6 deficiency and oxalate nephrocalcinosis in the cat. American Journal of Medicine 27:72-80. pubmed.ncbi.nlm.nih.gov
Documents vitamin B6 deficiency effects (oxalate nephrocalcinosis) in cats - Godfrey H, Ellis JL, Verbrugghe A (2025). A meta-analysis: dietary carbohydrates do not increase body fat or fasted insulin and glucose in cats. Journal of Animal Science 103. pubmed.ncbi.nlm.nih.gov
Source nuancing the effect of carbohydrates on body fat, insulin and glucose in cats - Green AS, Ramsey JJ, Villaverde C, Asami DK, Wei A, Fascetti AJ (2008). Cats are able to adapt protein oxidation to protein intake provided their requirement for dietary protein is met. Journal of Nutrition 138(6):1053–1060. pubmed.ncbi.nlm.nih.gov
Backs cats’ ability to adapt protein oxidation once requirement is met - Ha YS, Hopper K, Epstein SE (2013). Incidence, Nature, and Etiology of Metabolic Alkalosis in Dogs and Cats. JVIM 27(4):847-53. pubmed.ncbi.nlm.nih.gov
Source on chloride disturbances and metabolic alkalosis in dogs and cats - Hand MS, Thatcher CD, Remillard RL, Roudebush P, Novotny BJ (2010). Small Animal Clinical Nutrition, 5th Edition — types of fiber, fermentation to SCFA and effect on mineral absorption. markmorrisinstitute.org
Core source on ash, fiber types, SCFA fermentation and effects on mineral absorption - Hayes KC, Carey RE, Schmidt SY (1975). Retinal degeneration associated with taurine deficiency in the cat. Science 188(4191):949-951. doi.org
Documents retinal degeneration from taurine deficiency in cats - Heinemann KM, Bauer JE (2006). Docosahexaenoic acid and neurologic development in animals. JAVMA 228(5):700–705. doi.org
Supports DHA’s role in neurologic development and vision in young animals - Hendriks WH, Wu YB, Shields RG et al. (2002). Vitamin E Requirement of Adult Cats Increases Slightly with High Dietary Intake of Polyunsaturated Fatty Acids. J Nutr 132(6):1613S-1615S. doi.org
Backs that vitamin E requirement rises with high dietary PUFA intake - How KL, Hazewinkel HAW, Mol JA (1994). Dietary vitamin D dependence of cat and dog due to inadequate cutaneous synthesis of vitamin D. Gen Comp Endocrinol 96:12-18. doi.org
Supports the dietary dependence on vitamin D in dogs and cats due to inadequate cutaneous synthesis - International Renal Interest Society (IRIS). CKD Risk Factors. iris-kidney.com
Source on water and dehydration as a risk factor for kidney disease (CKD) - Kather S, Grützner N, Kook PH, Dengler F, Heilmann RM (2020). Review of cobalamin status and disorders of cobalamin metabolism in dogs. J Vet Intern Med. doi.org
Supports that cobalamin (B12) deficiency stems mainly from intestinal disease, not diet - Kritikos G, Parr JM, Verbrugghe A (2017). The Role of Thiamine and Effects of Deficiency in Dogs and Cats. Veterinary Sciences 4(4):59. doi.org
Documents thiamine deficiency, including from raw fish containing thiaminase - Lenox CE (2016). Role of dietary fatty acids in dogs and cats. Today’s Veterinary Practice. todaysveterinarypractice.com
Supports fatty-acid ratio importance and the pro-inflammatory effect of excess linoleic acid - Lenox CE, Bauer JE (2013). Potential adverse effects of omega-3 fatty acids in dogs and cats. Journal of Veterinary Internal Medicine. doi.org
Documents adverse effects of excess omega-3 (anticoagulant action) and the omega-6:3 ratio - Li P, Wu G (2023). Amino acid nutrition and metabolism in domestic cats and dogs. Journal of Animal Science and Biotechnology 14:19. doi.org
Backs amino acid requirements and metabolism in dogs and cats - Lulich JP, Osborne CA. Calcium Oxalate Urolithiasis — increased dietary oxalate intake (including vitamin C) raises the risk of calcium oxalate urolithiasis in dogs. Clinician’s Brief. cliniciansbrief.com
Supports oxalate urolithiasis risk from excess vitamin C - Lyu Y, Wu C, Li L, Pu J (2025). Current Evidence on Raw Meat Diets in Pets. Animals 15(3):293. doi.org
Source on raw-meat safety and obesity risk from excess fat - MacDonald ML, Rogers QR, Morris JG (1984). Effects of dietary arachidonate deficiency on the aggregation of cat platelets. Comparative Biochemistry and Physiology. doi.org
Documents clotting disorders in cats from arachidonic acid deficiency - Mahar KM, Portelli S, Coatney R, Chen EP (2012). Gastric pH and gastric residence time in fasted and fed conscious beagle dogs using the Bravo pH system. Journal of Pharmaceutical Sciences 101(7):2439–48. pubmed.ncbi.nlm.nih.gov
Backs fasting and gastric residence guidance during BARF transition - Markovich JE, Heinze CR, Freeman LM (2013). Thiamine deficiency in dogs and cats. JAVMA 243(5):649–656. doi.org
Supports thiamine deficiency risk from raw fish thiaminase - Marx FR, Machado GS, Pezzali JG, Marcolla CS, Kessler AM, Ahlstrøm Ø, Trevizan L (2016). Raw beef bones as chewing items to reduce dental calculus in Beagle dogs. Australian Veterinary Journal 94(1–2):18–23. pubmed.ncbi.nlm.nih.gov
Evidence raw bone chewing mechanically reduces dental calculus in dogs - McCauley SR, Clark SD, Quest BW, Streeter RM, Oxford EM (2020). Review of canine dilated cardiomyopathy in the wake of diet-associated concerns — high fiber content and taurine balance in dogs. J Anim Sci 98(6):skaa155. doi.org
Source on excess fiber and its gut and taurine effects - McCown JL, Specht AJ (2011). Iron Homeostasis and Disorders in Dogs and Cats: A Review. Journal of the American Animal Hospital Association. doi.org
Backs iron homeostasis and regulated intestinal absorption - Merck Veterinary Manual (2023). Nutritional Requirements of Small Animals. merckvetmanual.com
Source on requirements and ash excess burdening the urinary tract - Merck Veterinary Manual. Dental Caries in Small Animals — tooth decay practically does not occur in cats, rare in dogs. merckvetmanual.com
Supports that dental caries rarely occurs in cats and dogs - Merck Veterinary Manual. Diabetes Mellitus in Dogs and Cats — obesity as a factor in insulin resistance and diabetes. merckvetmanual.com
Backs obesity-driven insulin resistance and diabetes from excess carbohydrates - Merck Veterinary Manual. Goiter in Animals. merckvetmanual.com
Source on iodine deficiency and goiter in animals - Merck Veterinary Manual. Salt Toxicosis in Animals. merckvetmanual.com
Supports wide sodium tolerance without hypertension in healthy pets - Merck Veterinary Manual. Selenium Toxicosis in Animals. merckvetmanual.com
Backs selenium toxicity threshold (selenosis) from chronic oversupply - Merck/MSD Veterinary Manual. Cushing Syndrome (Hyperadrenocorticism) in Animals. msdvetmanual.com
Explains hypercholesterolemia rarely dietary, linked to Cushing’s disease - Merck/MSD Veterinary Manual. Hypothyroidism in Animals (hypercholesterolemia in approx. 80% of dogs with hypothyroidism. msdvetmanual.com
Links hypercholesterolemia to hypothyroidism rather than diet - Merck/MSD Veterinary Manual. Nutritional Requirements of Small Animals. msdvetmanual.com
Source on requirements and Ca:P ratios used in BARFLAB standard - Merck/MSD Veterinary Manual. Yellow Fat Disease (Pansteatitis) in Cats and Other Animals. msdvetmanual.com
Supports pansteatitis risk in cats from excess PUFA without vitamin E - Morris JG (2004). Do cats need arachidonic acid in the diet for reproduction?. Journal of Animal Physiology and Animal Nutrition. doi.org
Confirms arachidonic acid’s role in feline reproduction - Morris JG, Rogers QR (1978). Ammonia intoxication in the near-adult cat as a result of a dietary deficiency of arginine. Science 199(4327):431-432. doi.org
Documents ammonia intoxication in cats from arginine deficiency - Morris JG, Rogers QR (1982). Metabolic basis for some of the nutritional peculiarities of the cat. Journal of Small Animal Practice 23:599–613. doi.org
Source on feline metabolic peculiarities relevant to niacin - Mozaffarian D, Pischon T, Hankinson SE et al. (2004). Trans fatty acids and systemic inflammation in heart failure. American Journal of Clinical Nutrition 80(6):1521-1525. pubmed.ncbi.nlm.nih.gov
Supports that trans fats intensify inflammation and oxidative stress - MSD (Merck) Veterinary Manual. Overview of Disorders of Potassium Metabolism in Animals. msdvetmanual.com
Backs potassium and sodium balance, especially with kidney disease and diuretics - MSD Veterinary Manual. Pancreatitis in Dogs and Cats. msdvetmanual.com
Supports pancreatitis risk from sudden dietary fat load - Naigamwalla DZ, Webb JA, Giger U (2012). Iron deficiency anemia (review). Canadian Veterinary Journal 53(3):250-256. pmc.ncbi.nlm.nih.gov
Source on iron deficiency anemia and its symptoms - National Research Council (1987). Vitamin Tolerance of Animals — Chapter 11: Pantothenic Acid. National Academies Press. nap.nationalacademies.org nationalacademies.org
Confirms lack of pantothenic acid and riboflavin toxicity at high doses - National Research Council (NRC) (2006). Nutrient Requirements of Dogs and Cats. National Academies Press. Histidine deficiency in cats causes, among other things, cataract and weight loss. doi.org nap.nationalacademies.org
Source of requirements and control points for amino acids, fatty acids, and ash - Niza MM, Vilela CL, Ferreira LM (2003). Feline pansteatitis revisited: hazards of unbalanced home-made diets. Journal of Feline Medicine and Surgery 5(5):271-277. pubmed.ncbi.nlm.nih.gov doi.org
Links vitamin E deficiency to yellow fat disease in cats on poorly balanced diets - Pedrinelli V, Zafalon RVA, et al. (2019). Concentrations of macronutrients, minerals and heavy metals in home-prepared diets for adult dogs and cats. Scientific Reports 9:13058. doi.org
Shows that a too-low Ca:P ratio is the most common home-diet error - Pereira AM, Guedes M, Matos E, Pinto E, et al. (2020). Effect of Zinc Source and Exogenous Enzymes Supplementation on Zinc Status in Dogs Fed High Phytate Diets. Animals 10(3):400. pmc.ncbi.nlm.nih.gov
Data on canine zinc status and the rarity of meat-only deficiency - Pereira AM, Maia MRG, Fonseca AJM, Cabrita ARJ (2021). Zinc in Dog Nutrition, Health and Disease: A Review. Animals 11(4):978. doi.org
Backs zinc-copper antagonism and zinc’s role in hundreds of enzymes - Pezzali JG, et al. (2024). Minimum methionine requirement in adult cats. J Anim Sci. doi.org
Source for the methionine requirement in cats as obligate carnivores - Pion PD, Kittleson MD, Rogers QR, Morris JG (1987). Myocardial failure in cats associated with low plasma taurine: a reversible cardiomyopathy. Science 237(4816):764-768. doi.org
Proves taurine deficiency causes reversible cardiomyopathy in cats - Reynolds BS, Chetboul V, et al. (2024). Long-term safety of dietary salt: a 5-year prospective randomized blinded and controlled study in healthy aged cats (PEANUT study). JVIM. pmc.ncbi.nlm.nih.gov
Five-year study confirming cats tolerate high sodium without hypertension - Roush JK, Dodd CE, Fritsch DA, et al. (2010). Multicenter veterinary practice assessment of the effects of omega-3 fatty acids on osteoarthritis in dogs. JAVMA 236(1):59-66. doi.org
Basis for omega-3 benefits on canine osteoarthritis - Schweigert FJ, Raila J, Wichert B, Kienzle E (2002). Cats Absorb β-Carotene, but It Is Not Converted to Vitamin A. J Nutr 132(6):1610S-1612S. doi.org
Proves cats cannot convert beta-carotene into vitamin A - Seawright AA, English PB, Gartner RJW (1967). Hypervitaminosis A and deforming cervical spondylosis of the cat. J Comp Pathol 77(1):29-39. doi.org
Documents vitamin A excess and spondylosis in cats fed too much liver - Siani G, Mercaldo B, Alterisio MC, Di Loria A (2023). Vitamin B12 in Cats: Nutrition, Metabolism, and Disease. Animals 13(9):1474. doi.org
Source on vitamin B12 metabolism and hepatic storage in cats - Stockman J, Villaverde C, Corbee RJ (2021). Calcium, Phosphorus, and Vitamin D in Dogs and Cats: Beyond the Bones. Veterinary Clinics of North America: Small Animal Practice. doi.org pubmed.ncbi.nlm.nih.gov
Basis for calcium-phosphorus role in bone and phosphorus binding - Stockman J, Watson P, Gilham M, et al. (2017). Adult dogs are capable of regulating calcium balance, with no adverse effects on health, when fed a high-calcium diet. British Journal of Nutrition 117(9):1235-1243. doi.org
Proves healthy adult dogs regulate calcium balance on bone-based diets - Taylor S, Cannon M, Church D, et al. (iCatCare) (2025). iCatCare 2025 consensus guidelines on the diagnosis and management of diabetes mellitus in cats. Journal of Feline Medicine and Surgery 27. pmc.ncbi.nlm.nih.gov
Source on carbohydrate excess affecting microbiome and digestion - Tryfonidou MA, Holl MS, Vastenburg M, et al. (2002). Hormonal regulation of calcium homeostasis in two breeds of dogs during growth at different calcium intakes. Journal of Nutrition 132(11 Suppl):3363S–3366S. doi.org
Data on calcium homeostasis in growing dogs at varied calcium intakes - UFAW (Universities Federation for Animal Welfare). Miniature Schnauzer – Pancreatitis and Hyperlipidaemia (primary hypertriglyceridemia in the miniature schnauzer. ufaw.org.uk
Documents breed predisposition to hyperlipidemia independent of dietary cholesterol - USDA Agricultural Research Service, Nutrient Data Laboratory (2007). USDA Table of Nutrient Retention Factors, Release 6. agdatacommons.nal.usda.gov
Source of nutrient retention factors after processing used in generator calculations - Vecchiato CG, Delsante C, Galiazzo G et al. (2021). Cholecalciferol (Vitamin D3) Toxicity Observed in Five Cats. Front Vet Sci. doi.org
Documents vitamin D3 toxicity and accumulation in cats - Verbrugghe A, Hesta M (2017). Cats and Carbohydrates: The Carnivore Fantasy? — gluconeogenesis and carbohydrate metabolism in the cat. Veterinary Sciences 4(4):55. doi.org
Justifies the absence of a carbohydrate minimum via feline gluconeogenesis - Voigt MN, Eitenmiller RR (1991). Cooking losses of thiamin in food and its nutritional significance. Journal of Food Composition and Analysis. pubmed.ncbi.nlm.nih.gov
Source on cooking losses of thiamine relevant to vitamin B1 deficiency - Watson TDG (1998). Diet and Skin Disease in Dogs and Cats. Journal of Nutrition 128(12):2783S–2789S. doi.org
Basis for linoleic acid (omega-6) essentiality for skin and coat - White SD, Bourdeau P, Rosychuk RAW, et al. (2001). Zinc-responsive dermatosis in dogs. Veterinary Dermatology. pubmed.ncbi.nlm.nih.gov
Documents zinc-responsive dermatosis from low Zn:Cu in dogs - Xenoulis PG, Steiner JM (2010). Lipid metabolism and hyperlipidemia in dogs. The Veterinary Journal 183(1):12-21. pubmed.ncbi.nlm.nih.gov
Source on lipid metabolism and causes of canine hypercholesterolemia - Yu S, Rogers QR, Morris JG (2001). Effect of low levels of dietary tyrosine on the hair colour of cats. J Small Anim Pract 42(4):176-180. doi.org
Proves tyrosine deficiency causes reddish fading of dark coats - Zentrichova V, Pechova A, Kovarikova S (2021). Selenium and Dogs: A Systematic Review. Animals 11(2):418. pmc.ncbi.nlm.nih.gov
Basis for selenium-vitamin E cooperation in antioxidant defense in dogs - Zicker SC, Jewell DE, Yamka RM, Buber NA (2012). Evaluation of cognitive learning, memory, psychomotor, immunologic, and retinal functions in healthy puppies fed DHA-rich fish oil. JAVMA 241(5):583-594. doi.org
Source on DHA/EPA benefits for development and anti-inflammatory action in puppies