I am quite puzzled to,as I just lost Basil "My Old Man",my 12 yr old staffie,he had a brain tumour,he was a kind dog,very gentle,spoilt rotten,he was always there for me. But we did lose one of our other dogs called cherry and it seemed that he went downhill after she died.He was very close to her.Was one of your cats ill before the other one?Are they really close? did one illness follow the other one? I wonder with Basil whether it was stress that brought on the tumour.
Piggy2000