References · BARC clinical register
The literature behind the bowl
Citing our framework? The formal specification with boundaries, energy model and methodology is at The BARC scientific framework.
The peer-reviewed evidence behind BARC — Biologically Appropriate, Residually Corrected — the framework Growlrr uses to complete a fresh home bowl to the NRC 2006 nutrient floors. Organised in three tiers: the adequacy problem, the formulation evidence, and the metabolic-scaling context.
Tier 1 · The problem
Adequacy failure of uncorrected fresh diets
Owner-prepared raw or cooked diets, left uncorrected, fail to sustain long-term biological health and adequacy.
[1] · 2013
Evaluation of recipes of home-prepared maintenance diets for dogs
Stockman J, Fascetti AJ, Kass PH, Larsen JA
J Am Vet Med Assoc. 2013;242(11):1500–1505
PMID 23683013
[4] · 1967
Hypervitaminosis A and deforming cervical spondylosis of the cat
Seawright AA, English PB, Gartner RJW
J Comp Pathol. 1967;77(1):29–39
doi:10.1016/S0021-9975(67)80004-5
PMID 6030457
[5] · 2003
Feline pansteatitis revisited: hazards of unbalanced home-made diets
Niza MMRE, Vilela CL, Ferreira LMA
J Feline Med Surg. 2003;5(5):271–277
doi:10.1016/S1098-612X(03)00051-2
PMID 12948502
[6] · 2013
Current knowledge about the risks and benefits of raw meat-based diets for dogs and cats
Freeman LM, Chandler ML, Hamper BA, Weeth LP
J Am Vet Med Assoc. 2013;243(11):1549–1558
PMID 24261804
Tier 2 · The formulation
Formulation decisions and their safety margins
Why each correction is shaped the way it is — the deficiency literature it answers to, and the upper limits it stays under.
[2] · 1987
Myocardial failure in cats associated with low plasma taurine: a reversible cardiomyopathy
Pion PD, Kittleson MD, Rogers QR, Morris JG
Science. 1987;237(4816):764–768
PMID 3616607
[3] · 1975
Retinal degeneration associated with taurine deficiency in the cat
Hayes KC, Carey RE, Schmidt SY
Science. 1975;188(4191):949–951
PMID 1138364
[22] · 2019
Effects of the long-term feeding of diets enriched with inorganic phosphorus on the adult feline kidney and phosphorus metabolism
Alexander J, Stockman J, Atwal J, Butterwick R, Colyer A, Elliott D, Gilham M, Morris P, Staunton R, Renfrew H, et al
Br J Nutr. 2019;121(3):249–269
PMID 30572965
[23] · 2021
Towards establishing no observed adverse effect levels (NOAEL) for different sources of dietary phosphorus in feline adult diets: results from a 7-month feeding study
Coltherd JC, Alexander JE, Pink C, Rawlings J, Elliott J, Haydock R, Carvell-Miller LJ, Biourge VC, Molina L, Butterwick R, et al
Br J Nutr. 2021;126(11):1626–1641
PMID 33750494
[24] · 2002
Intestinal calcium absorption in growing dogs is influenced by calcium intake and age but not by growth rate
Tryfonidou MA, van den Broek J, van den Brom WE, Hazewinkel HAW
J Nutr. 2002;132(11):3363–3368
PMID 12421852
[25] · 1989
Nutrition in relation to skeletal growth deformities
Hazewinkel HAW
J Small Anim Pract. 1989;30(11):625–630
[27] · 1989
Copper absorption and retention in young men at three levels of dietary copper by use of the stable isotope ⁶⁵Cu
Turnlund JR, Keyes WR, Anderson HL, Acord LL
Am J Clin Nutr. 1989;49(5):870–878
PMID 2718922
[28] · 1992
Effects of age and sex on copper absorption, biological half-life, and status in humans
Johnson PE, Milne DB, Lykken GI
Am J Clin Nutr. 1992;56(5):917–925
PMID 1329483
[29] · 2014
25(OH)D₂ half-life is shorter than 25(OH)D₃ half-life and is influenced by DBP concentration and genotype
Jones KS, Assar S, Harnpanich D, Bouillon R, Lambrechts D, Prentice A, Schoenmakers I
J Clin Endocrinol Metab. 2014;99(9):3373–3381
PMID 24885631
Tier 3 · The context
Energy, evolution and caloric precision
What the animal actually needs, how that scales with size, and what free-living diets look like when measured rather than asserted.
[7] · 1990
Sustained metabolic scope
Peterson CC, Nagy KA, Diamond J
Proc Natl Acad Sci U S A. 1990;87(6):2324–2328
PMID 2315323
[8] · 2011
Estimation of the dietary nutrient profile of free-roaming feral cats: possible implications for nutrition of domestic cats
Plantinga EA, Bosch G, Hendriks WH
Br J Nutr. 2011;106(Suppl 1):S35–S48
PMID 22005434
[9] · 2015
Dietary nutrient profiles of wild wolves: insights for optimal dog nutrition?
Bosch G, Hagen-Plantinga EA, Hendriks WH
Br J Nutr. 2015;113(S1):S40–S54
PMID 25415597
[10] · 2014
Natural pet food: a review of natural diets and their impact on canine and feline physiology
Buff PR, Carter RA, Bauer JE, Kersey JH
J Anim Sci. 2014;92(9):3781–3791
PMID 25006071
[11] · 2011
Geometric analysis of macronutrient selection in the adult domestic cat,
Hewson-Hughes AK, Hewson-Hughes VL, Miller AT, Hall SR, Simpson SJ, Raubenheimer D
Felis catus *J Exp Biol
PMID 21346132
[12] · 2013
Geometric analysis of macronutrient selection in breeds of the domestic dog,
Hewson-Hughes AK, Hewson-Hughes VL, Colyer A, Miller AT, McGrane SJ, Hall SR, Butterwick RF, Simpson SJ, Raubenheimer D
Canis lupus familiaris *Behav Ecol
PMID 23243377
[13] · 1991
Dogs large and small: the allometry of energy requirements within a single species
Burger IH, Johnson JV
J Nutr. 1991;121(11 Suppl):S18–S21
doi:10.1093/jn/121.suppl_11.S18
PMID 1941223
[14] · 1932
Body size and metabolism
Kleiber M
Hilgardia. 1932;6(11):315–353
[15] · 2014
Energy requirements of adult dogs: a meta-analysis
Bermingham EN, Thomas DG, Cave NJ, Morris PJ, Butterwick RF, German AJ
PLoS One. 2014;9(10):e109681
doi:10.1371/journal.pone.0109681
PMID 25313818
[16] · 2002
Effects of diet restriction on life span and age-related changes in dogs
Kealy RD, Lawler DF, Ballam JM, Mantz SL, Biery DN, Greeley EH, Lust G, Segre M, Smith GK, Stowe HD
J Am Vet Med Assoc. 2002;220(9):1315–1320
doi:10.2460/javma.2002.220.1315
PMID 11991408
[17] · 2011
WSAVA Nutritional Assessment Guidelines
WSAVA Nutritional Assessment Guidelines Task Force: Freeman L, Becvarova I, Cave N, MacKay C, Nguyen P, Rama B, Takashima G, Tiffin R, Tsjimoto H, van Beukelen P
J Small Anim Pract. 2011;52(7):385–396
doi:10.1111/j.1748-5827.2011.01079.x
PMID 21649660
[18] · 2014
2014 AAHA weight management guidelines for dogs and cats
Brooks D, Churchill J, Fein K, Linder D, Michel KE, Tudor K, Ward E, Witzel A
J Am Anim Hosp Assoc. 2014;50(1):1–11
PMID 24216501
[19] · 2021
2021 AAHA nutrition and weight management guidelines for dogs and cats
Cline MG, Burns KM, Coe JB, Downing R, Durzi T, Murphy M, Parker V
J Am Anim Hosp Assoc. 2021;57(4):153–178
[20] · 2017
Risk of obesity in the neutered cat
Larsen JA
J Feline Med Surg. 2017;19(8):779–783
PMID 27432438
[21] · 2010
Energy-intake and activity risk factors for owner-perceived obesity in a defined population of Swedish dogs
Sallander M, Hagberg M, Hedhammar Å, Rundgren M, Lindberg JE
Prev Vet Med. 2010;96(1–2):132–141
doi:10.1016/j.prevetmed.2010.05.004
PMID 20542583
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
[26] · 1927
Probable inference, the law of succession, and statistical inference
Wilson EB
J Am Stat Assoc. 1927;22(158):209–212
[30] · 1984
Calder WA III
Size, Function, and Life History. Cambridge (MA): Harvard University Press; 1984
Tier 4 · The standards
Standards, regulatory and reference works
The published nutrient standards and guidelines the corrections are computed against.
[31] · 2006
National Research Council (US), Committee on Animal Nutrition
Nutrient Requirements of Dogs and Cats. Washington (DC): The National Academies Press; 2006
[32] · 2024
FEDIAF (European Pet Food Industry Federation)
Nutritional Guidelines for Complete and Complementary Pet Food for Cats and Dogs. Brussels: FEDIAF; September 2024
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
[33] ·
Dog and cat food nutrient profiles. In:
Association of American Feed Control Officials
AAFCO Official Publication. Champaign (IL): AAFCO
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
[34] ·
Merck Veterinary Manual
Nutritional requirements of small animals. Rahway (NJ): Merck & Co
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
[35] · 2003
International Council for Harmonisation
Q1A(R2): Stability Testing of New Drug Substances and Products. Step 4 version, 6 February 2003
[36] ·
Purina Institute
MER calculator for dogs [online tool]
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
Tier 5 · The inputs
Datasets, tools and industry guidance
Composition databases, premix and processing guidance, and the prior art this work builds on.
[37] · 2019
Haytowitz DB, Ahuja JKC, Wu X, Somanchi M, Nickle M, Nguyen QA, et al
USDA National Nutrient Database for Standard Reference, Legacy Release [dataset]
[38] · 1993
Billinghurst I
Give Your Dog a Bone: The Practical Commonsense Way to Feed Dogs for a Long Healthy Life. Bathurst (NSW): Warrigal Publi
[39] · 2012
Fascetti AJ, Delaney SJ, editors
Applied Veterinary Clinical Nutrition. Ames (IA): Wiley-Blackwell; 2012
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
[40] · 2003
Delaney SJ
Balance IT [online home-diet formulation tool]
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
[41] ·
DSM Nutritional Products
Optimum Vitamin Nutrition (OVN) guidelines [industry guideline]
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
[42] · 1986
Effect of pelleting on nutritional quality of feed. In:
Gadient M
Proceedings of the 1986 Maryland Nutrition Conference for Feed Manufacturers. College Park (MD); 1986
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
[43] · 1994
The performance of vitamins in multicomponent premixes. In:
Frye TM
Proceedings of the Roche Technical Symposium. Jefferson (GA); 1994
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
[44] · 1991
Vitamin stability in premixes and feeds: a practical approach. In:
Coelho MB
BASF Technical Symposium. Bloomington (MN); 1991
Correctly attributed; one bibliographic field (an edition, a page range or an access date) is still being settled.
Struck · do not cite
References we removed, and why
These appeared in earlier drafts of this work and have been struck. One of them does not exist; the others are real papers that were misattributed or used at second hand. They are listed here rather than quietly deleted, so that anyone who saw an older version can see what changed.
Manners-McCrea 1991, J Small Anim Pract 32(4):185–190
Does not exist. A conflation of three unrelated sources that survived every plausibility check except existence. The canine intra-species energy exponent of 0.64 is Burger & Johnson 1991 and nothing else.
Sallander M, et al. Maintenance energy requirement in adult dogs. Acta Vet Scand 2010;52:51
Does not exist as cited. That volume and article number belong to an unrelated paper. The real Sallander 2010 study is cited above instead.
Kerr KR, et al. Natural pet food… J Anim Sci 2014;92(9):3781–3791
Misattributed. The paper is correct; its first author is Buff.
Quaresma et al. (2025), Vet Sci 12(11):1106
Misattributed. The article exists; its authors are Mornard, Brasileiro and Marcondes-Santos. Not cited here.
Nagy 1987, 2–4× sustained metabolic scope
Secondary-only. Peterson, Nagy & Diamond 1990 is cited instead, which reports 1.5–5×.
A doubly-labelled-water study of feral cats
No such study was found. The feral-cat profile cited above is a modelled estimate, and is described as such.
A note on integrity
Every citation here is traced to a real, checkable source. One plausible-looking reference that appeared in earlier drafts — a fabricated composite of three unrelated papers — was struck permanently once we could not verify it. For the canine energy exponent we cite Burger & Johnson (1991), reference [20]. The more plausible a citation looks, the more it needs checking.
The standards bodies and research groups behind this work
- NRC — Nutrient Requirements of Dogs and Cats (2006) — the US National Academies nutrient reference every Growlrr bowl is validated against. Our baseline standard.
- AAFCO — Association of American Feed Control Officials — publisher of the US dog and cat food nutrient profiles and labelling rules.
- FEDIAF — European Pet Food Industry Federation, Nutritional Guidelines — the European nutrient standard; our growth and reproduction floors reference FEDIAF 2024.
- DogRisk — University of Helsinki — Dr. Anna Hielm-Björkman's research group studying diet and disease in dogs, including metabolic comparisons of kibble-fed and raw-fed dogs: kibble-fed dogs showed higher long-term blood sugar and blood lipids than dogs on low-carbohydrate fresh diets.
- WSAVA — Global Nutrition Guidelines — the World Small Animal Veterinary Association's nutrition assessment guidelines.
We also acknowledge BalanceIT (Dr. Sean Delaney, DVM, MS) as the home-diet-correction precedent — see provenance.