Mike, have a blood test done............we have had a couple that did that over the years and ended up with a liver disease. With the right meds it can be cured and the liver go back to normal but it is a disease that gets out of hand, there is no going back. If your vet wants to check with ours about it, can call Dr Dearixon at 214 252 0800 for the type of medication she subscribed and it brought the latest 3 around. Before we lost a couple that we didn't know to check that out. Millie Sanders at Txferretrescue.org with Texas Ferret Lovers Rescue and connecting Foster homes and sanctuaries [Posted in FML 8090]