Was that the show where they showed a lady who has several ferrets and had a plastic tube running down her stairs with the ferrets sliding down it? I think she had a ferret shelter? Maybe you saw a different PBS show but I saw one a couple years ago like you described. It is a good way for people to see how they really are. I'm glad you enjoyed it! Sometimes I sit and watch these crazy critters and think that no one would believe me if I tried to tell them what these guys do around here!
Here is an example:
Buster in a box after shredding the styrofoam inside...
All you can do is laugh, grab the camera, and then clean up the mess (including the ferret who had to be bathed to get the styrofoam off his fur from the static electricity!).