You cannot knowingly sell the meat of an animal that died of a disease.

The Law Explained

Before the establishment of the FDA, state agriculture laws had to explicitly state that selling diseased meat to your neighbors was a bad idea. If an animal died of natural or sickly causes rather than being properly butchered, its meat is strictly forbidden for human consumption. This basic food safety law prevents unscrupulous farmers from recouping losses by poisoning the public.