Yes he does but not religiously. He will open anything he possibly can so if it is not a welded chain then I know it usually wont last very long with him and if the o rings are not welded then I will have to close them up again and again. He has a few chains that are welded that he has not destroyed. Thankfully he tends to go through phases of what he likes to destroy so he will give the chains, o rings and quick links a bit of a break when his focus has moved to throwing the water bowl, wood chipping or finding welds on the cage to pop. When he is obsessed with dropping the toys or chain and o ring dismantling then I switch everything over to skewers that have the big acrylic ball or lengths of SS wire so the only thing he can do is wood chip. He keeps me very busy redoing the things I have just done lol.