2,362. A Stomach With Milk in It

Maachalos Assuros 9:14

An udder that was cut may not be roasted on a spit over other meat, but if one did so, everything remains permitted.

Maachalos Assuros 9:15

If an animal's stomach is cooked with milk inside it, it is permitted because the liquid is no longer considered milk. Rather, it’s considered waste because it was changed through digestion.