Anglezoo, are you on the ferret store forum? I saw the same /'s asked there this am? I am chaotic chaos on there & it is an awesome site! Anyways, I have used corncob litter for my rats I did not like it so I've never used it on ferrets, I use either wood stove pellets or woody pet & love them both! If it is clumping litter than I would NOT use it on frrets, too many blockage/urinary problems can occur.
bil jac treats, I feed them to my dogs I've never looked at the ingredients for the cat ones but if there is a lot of animal protein it should be fine. I try to feed my ferrets mostly hard treats as it's better for their teeth.