The Torah writes in three places “לא תבשל גדי בחלב אמו”, You shall not cook a goat in its mother’s milk. The Gemara (חולין קטו) learns from this three separate prohibitions in regard to mixing milk and meat. Do not cook meat and milk together. Do not eat meat and milk that has been cooked together. Do not have any enjoyment or benefit from meat and milk that have been cooked together. The prohibition of the Torah extends only to meat from a domesticated animal, such as a cow or sheep, but not to meat from a non-domesticated animal such as a deer or giraffe. The prohibition further applies only to milk and meat that were cooked together, not meat and milk that were joined in any other way. Our Sages added to the Torah prohibition that one may not eat any type of mixture of milk and meat. They also prohibited milk and meat which was smoked or salted together and even prohibited putting them into one’s mouth at the same time. They further extended the Torah’s prohibition to include non-domesticated animals and poultry. The rabbinic prohibition of a meat and dairy mixture does not prohibit having benefit from it or cooking it (שו”ע יו”ד פז:א) according to most poskim.