Why Home Prepared Meals Can Be Difficult And Dangerous

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By: Dr. Bill Ormston 

Many people never discuss their dog or cat’s diet with their veterinarians. Homemade, cooked diets are the diets that veterinarians worry may be nutritionally deficient hence the ones they complain about. When dogs show up in a veterinary clinic with a nutritional deficiency or imbalance it is generally because of a home-cooked diet that is severely lacking in one or several nutrients, or one that has been over-supplemented. When first starting on a home cooked diet, dogs initially do better. Cooked homemade diets are definitely better than kibble, but they are not as good as a balanced raw food diet. 

Cooked food is deficient in proteins, enzymes, minerals, and vitamins. The very act of cooking destroys or alters most or all of them (see potato clock pictures below) and this decreases the bio availability of these valuable chemicals. The structure of proteins is altered to the point they are less digestible, more abrasive on the intestines, and may even create allergies in the animals that eat them. Cooked fats are altered to the point where they can become toxic. Cooking also changes the correct balance of short and long chain fatty acids that are essential to an animal’s good health. Actually, carcinogenic compounds are found in cooked meats and the fats that get cooked along with it. 1 


Raw potato (left) runs the clock. Cooked potato (right) lacks the energy

The carbohydrates in any cooked dog food or kibble are quickly turned into sugars. This rapidly increases the level of blood sugar, which causes the release of insulin. The rise in insulin forces the cells to take up as much sugar as possible and then lay the remaining sugar down in the form of fat. 2 The fat burning and muscle building pathways are suppressed as insulin is released, and the immune system is also suppressed. This is what happens EVERY DAY and EVERY TIME our pets eat their kibbled food or cooked food with its grains. 

Vitamins and minerals can be added back into cooked food, but finding the appropriate balance is incredibly difficult. Synthetic vitamins and minerals do not always exhibit the same chirality (three dimensional structure) that the natural forms had, which means their efficiency is substantially decreased. This is compensated for by over supplementation, which then results in the inhibition of other necessary vitamins and minerals. For example, excess inorganic calcium reduces the availability of iron, copper, iodine, and zinc. 3 When the adrenal glands are stimulated, sodium concentrations go up causing magnesium levels to go down. This causes Calcium to go down and Potassium to go up. Copper and Zinc go down. Manganese goes up and the body’s reserves are depleted. The body becomes weak and further results in adrenal exhaustion. 

Raw food, however, has the perfect balance of vitamins and minerals if fed as a part of a prey-model diet (i.e. a whole rabbit). 4 A good raw food diet also has unaltered proteins and nutrients, and the bio availability of these nutrients is very high.

1Journal of Nutrition, 2004 vol. 134:776-784.
2Campbell, M.K. and S.O. Farrell. 2003. Biochemistry. 4th edition. pg 489-512
3Lonsdale, T. 2001. Raw Meaty Bones. pg 88
4Lonsdale, T. 2001. Raw Meaty Bones. Chapter 4 


Bill Ormston received a BS in animal science in 1982 and a veterinary degree in 1988, both from Iowa State University. Since graduation Dr. Ormston has worked in or owned mixed animal practices. In 1998 he attended Options For Animals and became certified in animal chiropractic care by the American Veterinary Chiropractic Assoc. In 2004 he completed his degree in Veterinary Homeopathy from the British Institute of Homeopathy. His current practice is in the area surrounding the Dallas metroplex where he uses only complementary therapies to treat both large and small animals.




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