Egregoros

Not true. Cats and dogs are carnivores which makes their meat significantly less palatable.

Horses were a part of the ancient indo-european diet and a horse sacrifice marked one of the most important times of year, it was also central to the rites expected of kings. However it was considered a pagan feast so christians gradually outlawed the eating of horses in order to suppress it.

This taboo persists to this day in many countries.