Hi there! I have a problem with my 7-months old male cat Max. In the last couple of weeks, he's becoming more aggressive and yesterday he attacked my leg, drawing blood. I have no idea what might be causing this and I am getting quite worried that I might have to say goodbye to him if he keeps attacking me. He's been to the vet and he seems to be in perfect health. He is an adopted stray cat and he's been with us (me and my boyfriend) for about 6 months now. We suppose that he hasn't had a lot of contact with his mother, as he was quite sick when we got him and totally alone. He's always been playful, but we've tried to discourage playful aggression, like biting hands and feet, etc. Recently, however, I am starting to notice that he doesn't seem to be playing anymore, but rather attacking more aggressively. I don't believe I have provoked him in any way, he attacked me when I was laying down napping. There is another detail. A couple of months ago, we neutered him. However, it turned out that he only has one descended testicle, which was removed. The vet operated him to find the other testicle but was unable to locate it. The vet told us that the testicle is microscopic and might not even develop. The only thing that comes to mind is that this testicle somehow still produces hormones as my cat act almost as if he was never neutered. Is this possible? Do you have any other suggestions?