My two are now 5 and 6 mos. old. Both are fixed and have been raised together now since mid-June. My boy, Thespis (6 mos.) seems to be very jealous of Aria (5 mos.). Both are cutting molars and have been teething for the last month. Thespis just cannot seem to let Aria play (we have an interactive toy, of which he dominates). If I show Aria any attention, it seems like as soon as he can he will pounce and beat on her. Ticks me off something fierce! He is a loving sweet kitty otherwise. Now they've had their differences in getting to know and get along with one another, but the hard fact is he is still twice her size and weight. He is now 8 lbs, she is now 4 lbs. I have tried playing with him to wear him out, but he is still doing this. I've had to lock him in the bathroom a couple times (kitty time-out). I've tried "giving her attention and loving on her when he goes on the attack, but he just seems to pay her back once I put her down." On the other hand, they will still sleep with each other and groom each other when they're tired. Sigh....I am losing patience. Help please?