The Torah forbids consuming meat with milk.
In the Book of Shemot (23, 19) the Torah says: "You shall not cook the calf in its mother milk".
The Rabbis explained that the prohibition to mix milk with meat does not refer exclusively to the cow's milk with her calf's meat, but to any meat of a mammal (cows, goats, sheep) with milk from any other Kosher mammal.
The Torah, explains Maimonides, brought the case of the calf and its mother's milk because that was the most common "meal" (a palatial meal, actually) done with milk and meat in Biblical times. The Torah presented that case as an illustration of the general rule, not as a specification.
The Rabbis extended the prohibition of milk and meat to any other 'meat', including bird's meat (chicken, turkey, duck) but they excluded fish (fish and meat belongs to a different category) and bird's eggs.
More about meat and milk, from
Rabbi Yosef Bitton. YMJC | 130 Steamboat Rd. | Great Neck | NY | 11024