So first, some backstory: (if you don't want to read all this you can skip to the end) I have a big, beautiful, loving cat. I've had him for about 4-5 years now. He's not 100% ours, he travels around to the neighbours too, but he spends his sleeps here and eats here too, so you could definetly say he's our cat, or rather, we're his humans . Now, a week and a half ago my friend adopted a female kitten, all of a sudden I wanted one too, so a week ago we found her bothers and sisters (their mother abandoned them at my friend's sister's friend's house) and I took one too, really cute. We took her to the vet, he said she's a few weeks old and that we should soon give her some shots, but not yet, we asked him if there could be trouble between him and her (btw, he's castrated or however its spelled, so that he won't fight with other cats around the neighbourhood). The vet said they should get along fine, but it might take them a week or two. It's been a week now, and whenever the kitten tries to get close to the cat, he does that sound cats make when they're angry at other cats, and runs away. For the last 3 days he keeps going in other people's houses, (until now it was only their backyard) and they've been really annoyed by this. Whenever I try to pet him, he seems frightened, and sometimes even tries to scratch me, I guess it's because he smells the kitten's smell and is afraid, but also when he "meows", I can hear in his voice he's sad, maybe even jealous. Now my mother wants to give away the kitten, and my sister who doesn't understand the big cat's pain, wants to kick him away and keep the kitten. I really can't choose between them, I like both of them, I can't imagine giving one of them away, tho if I had too I bet I'd give away the kitten... So basically I'm asking, will my big male (castrated) cat who's been around for 4-5 years get along with my new, few weeks old, 1 week living here, small female kitten?