I have a metal chain leash that is Reggie's. But my dad throws a fit if I have him tied on that in the house, says it will scratch up everything. He mainly chews it if I have him tied up in the house, even if he has toys over by him. He'll chew his leash on walks too, but not as much, because he is more interested in everything else. Problem is, he's a very effecient chewer.....if he's intent on it, he can destroy a leash in not much time at all.