Darwin, the new male was neutered about two years ago. He's about 2.5 now. Mister, the resident male was neutered about 5 years ago. He's almost six now. Mister was neutered *after* he was sexually mature.
Thanks,
Mark
My girlfriend moved in with her two cats (one male, one female). I have one male cat as well. We introduced them through the usual means and everything seemed to be fine for about a month. Now, my cat (the male) has been mounting her male cat from behind as if he is having sex with him.
I'm...