Felicity is 2 years old, and she has been fixed, we got our 2 kittens, Emo and Easter in late May, and we used all the proper techniques, isolating the kittens from Felicity and using vanilla extract, and rubbing them with a blanket to share the scent. We let the kittens out in July. Sometimes Felicity is fine with the kittens, she'll cuddle with them and lick them, but she's really random, and all of a sudden she'll just walk up to them and smack them for no reason, I wouldn't be concerned, but it's the way she doesit, she's sort of howls at them.. It's the same sound a cat makes when you hear them fighting with another cat outside. Well she does that and smacks them, then just walks away, and lately she's been getting more aggressive with them. She's not as cuddly as she used to be either, she used to sleep with me every night, and sit on my lap, and now she'll still come in our room, but she won't sleep in there, and she never sits on me. I still give her lots of attention so that she's not jealous, but I don't know how I should deter this aggression toward Emo and Easter, and make her happy again