This is an interesting thread. We are looking after a mum (who I desperately want to keep and am pestering hubby to this end) who has 4 kittens and the Cats Protection League are helping us. They asked if we would be happy to keep the kittens until they were 8 / 9 weeks before the started to rehome them, which I was happy with.

Nala is being an excellent mum but I do worry about her as she was thin when she arrived at our door and gave birth 3 weeks later. For her I think if the kittens were with her longer than the 8/9 weeks it would take too much out of her.