Hi everyone! I have two of the mini kongs for my ferrets and have never had a problem with them. I did notice the rubber lip on the small end of the kong the first time I purchased one, so I took an exacto knife and I cut the lip off. The rubber seems to be too tough for my ferrets to chew any bits off and swallow them. They like to chase the kongs and play with them but usually the kongs just get stashed until the next time I pull them out to play with. I like the kongs as toys and I know of several other people who give them to their ferrets as well and they just cut the lip off too. Just my two cents Take care, Cindy Smith The three kong stashing ferrets - Footsie, Oakley and Lancelot [Posted in FML issue 2414]