Hi Dave, Congratulations on your now energized and much happier furkid! You mentioned watching your baby play with a sink stopper attached to a chain. I just put a new rubber sink stopper in my bathroom and this triggered another danger to my fur family for me. Many sink stoppers are made of rubber or soft plastic. Either of these might pose a problem with intestinal blockage if a ferret were to ingest a piece. Ferrets love to eat rubber! I am celebrating with you on the improvement of your little one, but sure don't want to see a step backward in the progress. I hope this helps you. Cordially, Greta Hoisington [Posted in FML issue 4338]