Dear Anon - First don't give any your ferret anything other than ferret stuff. Any treats you give the little one will only fill it up and keep it from eating things that are good for it and will actually put weight on. Sugars and carbs do not add weight to ferrets like they do to humans. They are useless calories that will only fill up the tummy and not provide the nutrients needed to put the weight on. Second, get your babe to the vet and have a blood panel run to make sure there are no underlying medical issues causing the low weight and possible muscle wasting. My 2 guys Frankie and Poncho, especially Poncho, were thin and it turned out to be inflammatory bowel disease. Which is easily treated with Imuran, which is not expensive and a good thing too because they will be on it the rest of their lives. They are now starting to put weight on. After a couple of months they will go in for another blood panel to make sure the dosage is correct to keep the IBD under control. I hope that helps. Kim the Oregon one Kim Reyes Residential Specialist John L. Scott Real Estate Direct: (503) 380-4195 Toll Free 1-877-490-2595 http://www.kimreyes.com [log in to unmask] [Posted in FML issue 3839]