We had 2 female cats and the older one died so we waited 7 months and brought in a new female kitten. At first she was bugging the big cat wanting to play, but now she is downright mean and attacking the big kitty whenever she comes around. The big girl feels so anxious and uncomfortable everywhere in the house now. I tried time outs and that hasn’t worked. I don’t know what to do. I see pictures of cats snuggling and nuturi g eachother but my cats hate eachother