I've seen many posts on different ferret lists about dig stuff for ferrets. I tried the dig box stuff that www.theferretstore.com sells. My ferrets absolutely love it. It does melt because it's made out of some kind of starch, sorry I don't know which one. My one ferret, Buster, chews on them and I ran it under water to make sure. I think you can get it from packaging places too because my boyfriend's job gets it in some packages they recieve and he brings the stuff home. Of course, I always test it under water first. I just wanted to say that you might want to try this and it's not that expensive. I use a plastic container and just dump the stuff and some of their toys in there and they have a blast. Alice and her four musketeers [Posted in FML issue 3524]