R. Yossi Haglili says: It is written "You shall not eat all carrion … You shall not cook a kid in its mother's milk." I might think that what is forbidden as carrion may not be cooked in milk, so that a bird which is forbidden as carrion, may not be cooked in milk. It is, therefore, written "in its mother's milk" — to exclude a bird, where "mother's milk" does not obtain.