Well, it's a mistake anyone could have made if they had left a queen living with a stud. In fact she had been living with him for a year with no pregnancy. It's no different to the situation many non-pedigree owners are in when they know the cat is pregnant but don't know when the deed was done, and I guess 99 times out of 100 it would have been fine, I've just been very unlucky.

Liz