I recently made the realization that meltcat slime (meltcat body in melted state) might not be a distinct substance from meltcat milk or meltcat "cum" (their reproduction works different anyway) That means they just feed each other with basically their own liquified meat, technically an exotic form of cannibalism. (They probably need to have evolved strong natural defenses against prion disease.) Their reproduction works by mixing together multiple meltcats' slimes. Can be two meltcats but also three, four or more. The mixing can happen in a separate container but probably works better inside the enclosure of a meltcat body, similar to a womb. The pregnant meltcat can choose whether and how much to contribute their own slime to the mix.