The Pottenger cats study lasted for ten years, with three generations of cats being studied. Approximately 900 cats were involved. This study was specifically designed to show the difference between eating raw foods versus cooked and processed foods over a long period of time. The experiment in which one group of cats received only raw milk and raw meat, while other groups received part of the diet as pasteurized milk or cooked meat, can be summarized as follows:
- Adequate Diet A: 1/3 raw milk, cod liver oil and 2/3 raw meat.
- Defficient Diet B: 1/3 raw meat, cod liver oil and 2/3 pasteurized milk.
- Defficient Diet C: 1/3 raw meat, cod liver oil and 2/3 evaporated milk.
- Defficient Diet D: 1/3 raw meat, cod liver oil and 2/3 sweetened condensed milk.
- Defficient Diet E: raw metabolized vitamin D milk only.
Effects on cats
- The cats eating only raw food were disease free and healthy, generation after generation after generation.
- The cats eating the cooked and processed foods had all kinds of problems.
By the end of the first generation the cats started to develop degenerative diseases and became quite lazy.
- By the end of the second generation the cats had developed degenerative diseases by mid-life and started losing their coordination.
- By the end of the third generation the cats had developed degenerative diseases very early in life and some were born blind and weak and had a much shorter life span. Many of the third generation cats couldn't even produce offspring. There was an abundance of parasites and vermin while skin diseases and allergies increased from an incidence of five percent in normal cats to over 90 percent in the third generation of deficient cats.
- Kittens of the third generation did not survive six months. Bones became soft and pliable and the cats suffered from adverse personality changes.
- Males became docile while females became more aggressive.
- The cats suffered from most of the degenerative diseases encountered in human medicine and died out totally by the fourth generation.
His conclusions:
- A diet consisting exclusively of raw milk and raw meat was the only adequate intake which insured the maintenance of optimal health for the cats. Cats on the all-raw diet showed good bone structure with wide palates and plenty of space for the teeth as well as excellent bone density, shiny fur, and lack of parasites and disease. They reproduced with ease and were gentle and easy to handle.
- Cooking the meat, or substituting heat processed milks for raw, resulted in heterogeneous reproduction and physical degeneration that escalated with each successive generation.
- The changes in facial structure and beginning of degenerative diseases that Dr. Pottenger observed in cats on deficient diets mirrored the human degeneration that Dr. Price found in tribes and villages that had abandoned traditional foods.