Bava Kamma 80b:3
With regard to a cat, it is permitted to kill it even if it is privately owned; and it is prohibited to maintain it in one’s possession; and it is not subject to the prohibition against theft if one takes it from its owner; and, in the case of a lost cat, it is not subject to the obligation of returning a lost item to its owner.

Anti-cat sentiment is so Jewish that it's literally inscribed in the Talmud.