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We know eating fast foods 3 times daily is unhealthy, so why do we do it to our dogs? Omni combines quality Novel Proteins from clean sources such as plants, legumes and pulses into nutritionally dense, vet-formulated bites that are slow cooked.
Peer reviewed, observation based studies show that diets like Omni’s Vet-Formulated foods can lead to healthier and longer lives for dogs as well as benefits such as:
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When formulated correctly, novel protein diets like Omni have been show to improve dog life span by up to 18 months.
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Your Questions
Don't dogs need meat?
Lots of people think dogs require meat in their diet but there is scientific evidence to prove that dogs thrive on plant-based diets (7, 11, 31, 54). In fact some of the longest living dogs on record were fed entirely plant-based, like Guinness World Record holder Bramble, who lived to the age of 25 (16, 17). In one study reported by world renowned vet and professor of animal welfare at The University of Winchester Dr. Andrew Knight, the median life expectancy of plant-based dogs was reported to be almost 13 years old (11), which is above average (32) and in certain parts of the world like India and Sri-lanka dogs have also been thriving on plant-based diets for generations (18).
Moreover, a recent peer reviewed study that monitored thousands of dogs eating various diets found that those on vegan diets lived up to 18 months longer than those eating conventional meat-based diets (54). Another research group found that dogs eating vegan diets required fewer lifetime medications and needed to visit the vet less frequently for health concerns (55). There’s now even data to show that plant-based dogs experience health benefits that their meat-eating counterparts don’t, such as improvements in gut health, resolution of skin complaints and reduction in anxious behaviours like aggression (59). One study also showed that dogs suffering from vitamin D deficiency after being fed a variety of popular meat based diets saw a resolution in their deficiency after switching to a vet formulated vegan dry food diet (72). The take home message is that dogs do not require meat, they need protein but this can come from delicious plant-based sources too (4, 5, 6, 31).
But aren’t dog’s carnivores?
Dogs are in fact nutritional omnivores as demonstrated by a robust scientific study published in the reputable journal, Nature (1,2) in which it was shown that they have 30 copies of the AMY2B gene responsible for digesting plant-based foods.
They have also evolved relatively long intestines (21) (almost as long as humans) and relatively flat surfaces on their molars (22, 31) which they use for digesting and chewing a whole range of foods. Dogs also have other hallmarks of an omnivore such as producing salivary amylase (61), high levels of glucokinase (62) ,and having Type D tastebuds (63).
The common misconception that dogs are carnivores probably arises from the fact that they are classified in the order Carnivora but so are plenty of other species like bears, skunks, racoons who are omnivores and even the giant panda who thrives on a plant-based diet (20).
Is plant protein digestible to dogs?
Absolutely yes, studies which have looked at how much protein dogs can absorb from plant-based and fungi-based foods like soya and yeast demonstrated over 75% digestibility which is on par with meat-based foods (23, 24, 25, 34, 35, 64-69). Both these protein sources also contain all 10 essential amino acids (36, 37) that dogs need to thrive.
Isn't there too much fibre in plant-based food?
The average amount of fibre in a commercial dog food diet is between 2-4%. Omni’s plant-powered recipe has a fibre content of 3% which is on par with meat- based diets. In our taste test trials with over 200 dog guardians, 100% of participants reported that their dog’s stool consistency was either ‘normal’ or ‘perfect’ and there were no reports of any digestive upsets*. Additionally, recent peer reviewed research that was published in a scientific journal showed that out of 100 dogs eating the Omni diet for up to a year, 90% with watery faeces saw an improvement after switching from a meat-based diet to Omni and 86% of dogs with soft faeces became more firm/normal after switching to Omni (59).
Can I mix omni with other meat-based diets?
We are proud that our recipes are nutritionally complete and so include everything your dog needs to thrive. This means Omni can be fed as a sole ration. For those not quite ready to go fully plant-basee, we also fully support a 'flexitarian approach' like meat free lunches or using Omni as a mixer. Every little helps to bring some of the health and environmental benefits of plant-power to meal times.
Can plant-based food provide the essential fatty acids dogs need?
All the essential fats and oils that dogs need, including omegas 3 and 6 are found in a variety of both meat and plant-based foods (28, 31). Omni’s recipe is rich in plant-based sources of these nutrients so provides the necessary essential fatty acids required to thrive.
References
* Data on file
- Buff P.R., Carter R.A., Bauer J.E., Kersey J.N. (2014) Natural pet food: A review of natural diets and their impact on canine and feline physiology. J. Anim. Sci.;92:3781–3791. doi: 10.2527/jas.2014-7789
- Axelsson E., Ratnakumar A., Arendt M.L., Maqbool K., Webster M.T., Perloski M., Liberg O., Arnemo J.M., Hedhammar A., Lindblad-Toh K. (2013) The genomic signature of dog domestication reveals adaptation to a starch-rich diet. Nature; 495:360–364. doi: 10.1038/nature11837
- The European Pet Food Industry (FEDIAF) Nutrition [ Accessed on 3 June 2021] Available online: http://www.fediaf.org/self-regulation/nutrition/
- Gentle World Good Nutrition for Healthy Vegan Dogs [Accessed on 3 June 2021] Available online: http://www.webcitation.org/6ineIZmNQ
- Peden J. (1999) Vegetarian Cats & Dogs. 3rd ed. Harbingers of a New Age; Troy, MT, USA
- Semp P.-G. (2014) Master’s Thesis. Veterinary University of Vienna; Vienna, Austria: Vegan Nutrition of Dogs and Cats
- Brown W.Y., Vanselow B.A., Redman A.J., Pluske J.R. (2009) An experimental meat-free diet maintained haematological characteristics in sprint-racing sled dogs. Br. J. Nutr.;102:1318–1323. doi: 10.1017/S0007114509389254
- People for the Ethical Treatment of Animals (PETA) Dog Health Survey. [Accessed on 3 June 2021]
- Marks S.L., Rankin S.C., Byrne B.A., Weese J.S. (2011) Enteropathogenic bacteria in dogs and cats: Diagnosis, epidemology, treatment, and control. J. Vet. Intern. Med.;25:1195–1208. doi:
- Carrión P.A., Thompson L.J., Motarjemi Y., Lelieveld H., (2014) Food Safety Management: A Practical Guide for the Food Industry. Academic Press; London, UK:. pp. 379–395
- Knight, A. and Leitsberger, M. (2016) Vegetarian versus meat-based diets for companion animals. Animals 6, 57.
- Boyer C.I., Jr., Andrews E.J., deLahunta A., Bache C.A., Gutenman W.H., Lisk D.J. (1978) Accumulation of mercury and selenium in tissues of kittens fed commercial cat food. Cornell Vet.;68:365–374.
- Anonymous. Your Pet’s Dog Food Could Be Dangerous. [Accessed on 8 December 2014] Available online: http://www.wavy.com/Global/story.asp?S=1018127&nav=23iiCT4S.
- Porecca K. (1995) Personal letter to James Peden re: Interview of University of California (Davis), North Carolina State University, and University of Guelph Researchers investigating the connection between dilated cardiomyopathy and diet
- Perry T. What’s Really for Dinner? [Accessed on 7 July 2016] Available online: http://www.webcitation.org/6ipEL5YVR.
- https://www.bordercolliefanclub.com/bramble-the-vegan-dog-lives-to-189-years/
- https://aminoapps.com/c/vegan/page/blog/vegan-dog-lives-to-27-years-of-age/N4ai_MuaRE5qNoYVN1DN85ap0GVjz3j
- https://v-dog.com/blogs/v-dog-blog/vegan-diets-for-dogs-what-about-longevity
- https://www.fediaf.org/39-prepared-pet-foods/80-understanding-labels.html
- https://vetnutrition.tufts.edu/2016/07/vegan-dogs-a-healthy-lifestyle-or-going-against-nature/
- https://www.petmd.com/dog/nutrition/7-interesting-facts-about-your-dogs-digestive-system
- http://www.vivo.colostate.edu/hbooks/pathphys/digestion/pregastric/dogpage.html
- Félix AP, Zanatta CP, Brito CB, et al. (2013) Digestibility and metabolizable energy of raw soybeans manufactured with different processing treatments and fed to adult dogs and puppies. J Anim Sci;91:2794–2801.
- Carciofi A, de-Oliviera L, Valério A, et al. (2009) Comparison of micronized whole soybeans to common protein sources in dry dog and cat diets. Anim Feed Sci Technol;151:251–260.
- Yamka R, Kitts S, Harmon D. (2005) Evaluation of low-oligosaccharide and low-oligosaccharide low-phytate whole soya beans in canine foods. Anim Feed Sci Technol;120:79–91.
- Hill D. (2004) Alternative proteins in companion animal nutrition, in Proceedings. Pet Food Assoc Canada Fall Conf;1–12
- Hazewinkel HA, Tryfonidou MA. (2002) Vitamin D3 metabolism in dogs. Mol Cell Endocrinol;197:23–33.
- Boland R, Skliar M, Curino A, et al. (2003) Vitamin D compounds in plants. Plant Sci;164:357–369.
- Jäpelt RB, Jakobsen J. (2013) Vitamin D in plants: a review of occurrence, analysis, and biosynthesis. Front Plant Sci;4:136
- Knight, A. and Leitsberger, M. (2016). Vegetarian versus meat-based diets for companion animals. Animals 6, 57.
- Dodd SAS, Adolphe JL, Verbrugghe A. (2018) Plant-based diets for dogs. J Am Vet Med Assoc. Dec 1;253(11):1425-1432. doi: 10.2460/javma.253.11.1425. PMID: 30451617.
- https://www.petmd.com/dog/wellness/evr_dg_how_long_do_dogs_live [Accessed 2 June 2021]
- https://www.utep.edu/leb/pleistnm/stuff/stuff2.htm [Accessed 2 June 2021]
- M S Martins, N K Sakomura, D F Souza, F O R Filho, M O S Gomes, R S Vasconcellos, A C Carciofi (2014) Brewer’s yeast and sugarcane yeast as protein sources for dogs, J Anim Physiol Anim Nutr (Berl) 2014 Oct;98(5):948-57. doi: 10.1111/jpn.12145.
- Christina Golder, James L Weemhoff, Dennis E Jewell (2020) Cats Have Increased Protein Digestibility as Compared to Dogs and Improve Their Ability to Absorb Protein as Dietary Protein Intake Shifts from Animal to Plant Sources 24;10(3):541. doi: 10.3390/ani10030541.
- Henkel J. (2000) Soy. Health claims for soy protein, questions about other components. FDA Consum ;34(3):13–15,18–20.
- Yalçin, Sakine & Erol, H & Özsoy, Bülent & Onbaşılar, I. (2008) Effects of the usage of dried brewing yeast in the diets on the performance, egg traits and blood parameters in quails. Animal : an international journal of animal bioscience. 2. 1780-5. 10.1017/S1751731108003170.
- Rosser EJ (1993) Diagnosis of food allergy in dogs. Journal of the American Veterinary Medical Association; 203(2):259-262.
- Mueller RS, Olivry T, Prélaud P. (2016) Critically appraised topic on adverse food reactions of companion animals: common food allergen sources in dogs and cats. BMC Vet Res.12:9. Published 2016 Jan 12. doi:10.1186/s12917-016-0633-8
- https://www.kentlive.news/whats-on/shopping/salmonella-fears-spark-urgent-recall-4328262
- https://www.food.gov.uk/news-alerts/alert/fsa-prin-31-2020
- L. Martinez-Anton, M. Marenda, S.M. Firestone, R.N. Bushell, G. Child, A.I. Hamilton, S.N. Long, M.A.R. Le Chevoir (2018) Investigation of the Role of Campylobacter Infection in Suspected Acute Polyradiculoneuritis in Dog
- https://www.foodsafetynews.com/2018/10/four-stec-infections-one-person-dead-after-exposure-to-raw-pet-food/
- https://www.theguardian.com/science/2018/jan/12/scientists-criticise-trend-for-raw-meat-pet-food-after-analysis-finds-pathogens
- https://news.cancerresearchuk.org/2015/10/26/processed-meat-and-cancer-what-you-need-to-know/
- D.F. Merlo, L. Rossi, C. Pellegrino, M. Ceppi, U. Cardellino, C. Capurro, A. Ratto, P.L. Sambucco, V. Sestito, G. Tanara, V. Bocchini (2008) Cancer Incidence in Pet Dogs: Findings of the Animal Tumor Registry of Genoa, Italy
https://doi.org/10.1111/j.1939-1676.2008.0133.x , journal of veterinary internal medicine - https://www.pfma.org.uk/_assets/docs/White%20Papers/PFMA-Obesity-Report-2019.pdf
- https://www.pfma.org.uk/grain-free-factsheet
- https://fediaf.org/images/FEDIAF_Nutritional_Guidelines_2020_20200917.pdf
- https://www.ksvdl.org/resources/documents/dcm-forum/Confidential-Abstract-for-release-October-14-2020-Final.pdf
- https://www.ksvdl.org/resources/documents/dcm-forum/DCM-Forum-SolomonOpening-Remarks.pdf
- https://stpetersbark.com/finally-theres-no-evidence-linking-grain-free-diets-and-non-hereditary-heart-conditions-in-dogs/
- Okin GS (2017) Environmental impacts of food consumption by dogs and cats. PLoS ONE 12(8): e0181301. https://doi.org/10.1371/journal.pone.0181301
- Dodd, S., et al.Owner perception of health of North American dogs fed meat- or plant-based diets. Research in Veterinary Science, Volume 149 ,2022, Pages 36-46, ISSN 0034-5288. https://doi.org/10.1016/j.rvsc.2022.06.002.
- Knight A, Huang E, Rai N, Brown H (2022) Vegan versus meat-based dog food: Guardian-reported indicators of health. PLOS ONE 17(4): e0265662. https://doi.org/10.1371/journal.pone.0265662
- Vale RJD, Vale B. Time to Eat the Dog?: The Real Guide to Sustainable Living: Thames & Hudson; 2009.
- https://www.andrewknight.info/wp-content/uploads/2022/09/Lawton-New-Sci-2022-09-24.pdf
- Pedrinelli V, Teixeira FA, Queiroz MR, Brunetto MA. Environmental impact of diets for dogs and cats. Scientific Reports. 2022;12(1):18510.
- Mike Davies. Reported Health Benefits of a Vegan Dog Food – a Likert Scale-type Survey of 100 Guardians. Archives of Clinical and Biomedical Research 6 (2022): 889-905.
- Davies, M., Alborough, R., Jones, L. et al. Mineral analysis of complete dog and cat foods in the UK and compliance with European guidelines. Sci Rep 7, 17107 (2017). https://doi.org/10.1038/s41598-017-17159-7
- Contreras-Aguilar MD, Tecles F, Martínez-Subiela S, Escribano D, Bernal LJ, Cerón JJ. Detection and measurement of alpha-amylase in canine saliva and changes after an experimentally induced sympathetic activation. BMC Vet Res. 2017 Aug 22;13(1):266. doi: 10.1186/s12917-017-1191-4. PMID: 28830550; PMCID: PMC5568211.
- Ballard FJ. Glucose utilization in mammalian liver. Comp Biochem Physiol. 1965 Mar;14:437-43. doi: 10.1016/0010-406x(65)90218-5. PMID: 14314983.
- Kanazawa H. Fine structure of the canine taste bud with special reference to gustatory cell functions. Arch Histol Cytol. 1993 Dec;56(5):533-48. doi: 10.1679/aohc.56.533. PMID: 8129987.
- Ingenpaß L, Abd El-Wahab A, Ullrich C, Kölln M, Ahmed MFE, et al. (2021) Nitrogen output in the urban environment using a vegetarian canine diet. PLOS ONE 16(9): e0257364. https://doi.org/10.1371/journal.pone.0257364
- C. L. Cargo-Froom, A. K. Shoveller, M. Z. Fan, 227 Apparent and true digestibility of minerals in animal and vegetable ingredient based adult maintenance dog food, Journal of Animal Science, Volume 95, Issue suppl_4, August 2017, Page 112, https://doi.org/10.2527/asasann.2017.227
- Venturini, KS, Sarcinelli, MF, Baller, MA, Putarov, TC, Malheiros, EB, Carciofi, AC. Processing traits and digestibility of extruded dog foods with soy protein concentrate. J Anim Physiol Anim Nutr. 2018; 102: 1077– 1087. https://doi.org/10.1111/jpn.12894
- R. C. Hill, C. F. Burrows, G. W. Ellison, J. E. Bauer, The effect of texturized vegetable protein from soy on nutrient digestibility compared to beef in cannulated dogs, Journal of Animal Science, Volume 79, Issue 8, August 2001, Pages 2162–2171, https://doi.org/10.2527/2001.7982162x
- Carciofi, A.C., Takakura, F.S., De-Oliveira, L.D., Teshima, E., Jeremias, J.T., Brunetto, M.A. and Prada, .F. (2008), Effects of six carbohydrate sources on dog diet digestibility and post-prandial glucose and insulin response. Journal of Animal Physiology and Animal Nutrition, 92: 326-336. https://doi.org/10.1111/j.1439-0396.2007.00794.x
- Julia Guazzelli Pezzali, Charles Gregory Aldrich, Effect of ancient grains and grain-free carbohydrate sources on extrusion parameters and nutrient utilization by dogs, Journal of Animal Science, Volume 97, Issue 9, September 2019, Pages 3758–3767, https://doi.org/10.1093/jas/skz237
- https://www.petfoodindustry.com/articles/11862-fda-ends-dcm-updates-no-causality-data-with-dog-foods
- https://www.bmj.com/company/newsroom/high-levels-of-potentially-harmful-bacteria-found-in-raw-meat-dog-food-products/
- Linde A, Lahiff M, Krantz A, Sharp N, Ng TT, Melgarejo T. Domestic dogs maintain positive clinical, nutritional, and hematological health outcomes when fed a commercial plant-based diet for a year. bioRxiv. 2023:2023.02.18.525405.
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But aren’t dog’s carnivores?
Dogs are in fact nutritional omnivores as demonstrated by a robust scientific study published in the reputable journal, Nature (1,2) in which it was shown that they have 30 copies of the AMY2B gene responsible for digesting plant-based foods.
They have also evolved relatively long intestines (21) (almost as long as humans) and relatively flat surfaces on their molars (22, 31) which they use for digesting and chewing a whole range of foods. Dogs also have other hallmarks of an omnivore such as producing salivary amylase (61), high levels of glucokinase (62) ,and having Type D tastebuds (63).
The common misconception that dogs are carnivores probably arises from the fact that they are classified in the order Carnivora but so are plenty of other species like bears, skunks, racoons who are omnivores and even the giant panda who thrives on a plant-based diet (20).
Is plant protein digestible to dogs?
Absolutely yes, studies which have looked at how much protein dogs can absorb from plant-based and fungi-based foods like soya and yeast demonstrated over 75% digestibility which is on par with meat-based foods (23, 24, 25, 34, 35, 64-69). Both these protein sources also contain all 10 essential amino acids (36, 37) that dogs need to thrive.
Isn't there too much fibre in plant-based food?
The average amount of fibre in a commercial dog food diet is between 2-4%. Omni’s plant-powered recipe has a fibre content of 3% which is on par with meat- based diets. In our taste test trials with over 200 dog guardians, 100% of participants reported that their dog’s stool consistency was either ‘normal’ or ‘perfect’ and there were no reports of any digestive upsets*. Additionally, recent peer reviewed research that was published in a scientific journal showed that out of 100 dogs eating the Omni diet for up to a year, 90% with watery faeces saw an improvement after switching from a meat-based diet to Omni and 86% of dogs with soft faeces became more firm/normal after switching to Omni (59).
Can I mix omni with other meat-based diets?
We are proud that our recipes are nutritionally complete and so include everything your dog needs to thrive. This means Omni can be fed as a sole ration. For those not quite ready to go fully plant-basee, we also fully support a 'flexitarian approach' like meat free lunches or using Omni as a mixer. Every little helps to bring some of the health and environmental benefits of plant-power to meal times.
Can plant-based food provide the essential fatty acids dogs need?
All the essential fats and oils that dogs need, including omegas 3 and 6 are found in a variety of both meat and plant-based foods (28, 31). Omni’s recipe is rich in plant-based sources of these nutrients so provides the necessary essential fatty acids required to thrive.
References
* Data on file
- Buff P.R., Carter R.A., Bauer J.E., Kersey J.N. (2014) Natural pet food: A review of natural diets and their impact on canine and feline physiology. J. Anim. Sci.;92:3781–3791. doi: 10.2527/jas.2014-7789
- Axelsson E., Ratnakumar A., Arendt M.L., Maqbool K., Webster M.T., Perloski M., Liberg O., Arnemo J.M., Hedhammar A., Lindblad-Toh K. (2013) The genomic signature of dog domestication reveals adaptation to a starch-rich diet. Nature; 495:360–364. doi: 10.1038/nature11837
- The European Pet Food Industry (FEDIAF) Nutrition [ Accessed on 3 June 2021] Available online: http://www.fediaf.org/self-regulation/nutrition/
- Gentle World Good Nutrition for Healthy Vegan Dogs [Accessed on 3 June 2021] Available online: http://www.webcitation.org/6ineIZmNQ
- Peden J. (1999) Vegetarian Cats & Dogs. 3rd ed. Harbingers of a New Age; Troy, MT, USA
- Semp P.-G. (2014) Master’s Thesis. Veterinary University of Vienna; Vienna, Austria: Vegan Nutrition of Dogs and Cats
- Brown W.Y., Vanselow B.A., Redman A.J., Pluske J.R. (2009) An experimental meat-free diet maintained haematological characteristics in sprint-racing sled dogs. Br. J. Nutr.;102:1318–1323. doi: 10.1017/S0007114509389254
- People for the Ethical Treatment of Animals (PETA) Dog Health Survey. [Accessed on 3 June 2021]
- Marks S.L., Rankin S.C., Byrne B.A., Weese J.S. (2011) Enteropathogenic bacteria in dogs and cats: Diagnosis, epidemology, treatment, and control. J. Vet. Intern. Med.;25:1195–1208. doi:
- Carrión P.A., Thompson L.J., Motarjemi Y., Lelieveld H., (2014) Food Safety Management: A Practical Guide for the Food Industry. Academic Press; London, UK:. pp. 379–395
- Knight, A. and Leitsberger, M. (2016) Vegetarian versus meat-based diets for companion animals. Animals 6, 57.
- Boyer C.I., Jr., Andrews E.J., deLahunta A., Bache C.A., Gutenman W.H., Lisk D.J. (1978) Accumulation of mercury and selenium in tissues of kittens fed commercial cat food. Cornell Vet.;68:365–374.
- Anonymous. Your Pet’s Dog Food Could Be Dangerous. [Accessed on 8 December 2014] Available online: http://www.wavy.com/Global/story.asp?S=1018127&nav=23iiCT4S.
- Porecca K. (1995) Personal letter to James Peden re: Interview of University of California (Davis), North Carolina State University, and University of Guelph Researchers investigating the connection between dilated cardiomyopathy and diet
- Perry T. What’s Really for Dinner? [Accessed on 7 July 2016] Available online: http://www.webcitation.org/6ipEL5YVR.
- https://www.bordercolliefanclub.com/bramble-the-vegan-dog-lives-to-189-years/
- https://aminoapps.com/c/vegan/page/blog/vegan-dog-lives-to-27-years-of-age/N4ai_MuaRE5qNoYVN1DN85ap0GVjz3j
- https://v-dog.com/blogs/v-dog-blog/vegan-diets-for-dogs-what-about-longevity
- https://www.fediaf.org/39-prepared-pet-foods/80-understanding-labels.html
- https://vetnutrition.tufts.edu/2016/07/vegan-dogs-a-healthy-lifestyle-or-going-against-nature/
- https://www.petmd.com/dog/nutrition/7-interesting-facts-about-your-dogs-digestive-system
- http://www.vivo.colostate.edu/hbooks/pathphys/digestion/pregastric/dogpage.html
- Félix AP, Zanatta CP, Brito CB, et al. (2013) Digestibility and metabolizable energy of raw soybeans manufactured with different processing treatments and fed to adult dogs and puppies. J Anim Sci;91:2794–2801.
- Carciofi A, de-Oliviera L, Valério A, et al. (2009) Comparison of micronized whole soybeans to common protein sources in dry dog and cat diets. Anim Feed Sci Technol;151:251–260.
- Yamka R, Kitts S, Harmon D. (2005) Evaluation of low-oligosaccharide and low-oligosaccharide low-phytate whole soya beans in canine foods. Anim Feed Sci Technol;120:79–91.
- Hill D. (2004) Alternative proteins in companion animal nutrition, in Proceedings. Pet Food Assoc Canada Fall Conf;1–12
- Hazewinkel HA, Tryfonidou MA. (2002) Vitamin D3 metabolism in dogs. Mol Cell Endocrinol;197:23–33.
- Boland R, Skliar M, Curino A, et al. (2003) Vitamin D compounds in plants. Plant Sci;164:357–369.
- Jäpelt RB, Jakobsen J. (2013) Vitamin D in plants: a review of occurrence, analysis, and biosynthesis. Front Plant Sci;4:136
- Knight, A. and Leitsberger, M. (2016). Vegetarian versus meat-based diets for companion animals. Animals 6, 57.
- Dodd SAS, Adolphe JL, Verbrugghe A. (2018) Plant-based diets for dogs. J Am Vet Med Assoc. Dec 1;253(11):1425-1432. doi: 10.2460/javma.253.11.1425. PMID: 30451617.
- https://www.petmd.com/dog/wellness/evr_dg_how_long_do_dogs_live [Accessed 2 June 2021]
- https://www.utep.edu/leb/pleistnm/stuff/stuff2.htm [Accessed 2 June 2021]
- M S Martins, N K Sakomura, D F Souza, F O R Filho, M O S Gomes, R S Vasconcellos, A C Carciofi (2014) Brewer’s yeast and sugarcane yeast as protein sources for dogs, J Anim Physiol Anim Nutr (Berl) 2014 Oct;98(5):948-57. doi: 10.1111/jpn.12145.
- Christina Golder, James L Weemhoff, Dennis E Jewell (2020) Cats Have Increased Protein Digestibility as Compared to Dogs and Improve Their Ability to Absorb Protein as Dietary Protein Intake Shifts from Animal to Plant Sources 24;10(3):541. doi: 10.3390/ani10030541.
- Henkel J. (2000) Soy. Health claims for soy protein, questions about other components. FDA Consum ;34(3):13–15,18–20.
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