I've found out today that my 15 year old cat has at least two large cancerous tumours and has months left at best. Obviously I don't want him to suffer and if he's in pain, I'll have him put down rather than prolonging his suffering. While very sad, that part is also very straight forward in my mind. What's not straight forward though is how and when I tell my 4 year old son. I want him to be able to grief, but I don't want him to get scared. I'm sure that unfortunately many people on here have gone through the same thing. What did you do? How did it go?