Thanks for all the messages, it's great to hear opinions of others that aren't so emotionally involved. Lottie is really missing Molly. She was howling at 5.30am this morning - something she has never done before. I wish I could understand what's going on in her head! Molly is fine at mother in laws;enjoying the peace in fact. I think I will try and reintroduce them in a week or so. I have 2 children (one is 3) and this worries me. Lottie bit me during the latest fight, although by accident. It is impossible to get Lottie off Molly - her grip is so tight. Molly just lies back and whimpers. I will consult a behaviourist but I think as Lottie grows (she is now 7 months) she will fight for dominance more. I just can't understand why they will sleep curled up togethar and then try and kill each other! Has anyone ever resolved an problen like this?