When I was young it was the Golden rule that you NEVER EVER touched the Kits until they were several Weeks old ! I do not know if it was the right thing to do but all Ferret breeders abided by that rule now days though most people who breed a litter cannot wait to take pictures , handle , and Sex the litter , well to me this cannot be right and I think that you should just let them get on with it ! after Mum knows best and you should let Her do Her thing in peace .