Quote Originally Posted by Scooby4
Are you sure he is too thin? They don't get very heavy and can "feel" kind of bony. What kind of food are you feeding? That could make a difference. My ferret eats Cat food and NOT ferret food. She really likes the Chef's blend. My cat doesn't so they don't share.
Try adding some wet cat food to the food. Wet/Canned cat food has extra calories to it. It may be okay to give the ferret raisins or other dry fruits. I get a great "Ferret treat" in a can at the pet store that has lot's of fruits in it.
Does your ferret roam free? Maybe it is eating something in it's environment that isn't too healthy for it. I know mine will eat a few things like candle wax. She loves to eat candles which isn't good for her!
I am also concerned about the medications. This could also be a potential cause for not eating properly. The medicine could have side effects or the stress of taking the medication could be an issue.
Did you know that Ferrets are the only animal that can catch colds from humans? They do have an over the counter cold medicine if needed. I would also avoid handling the ferret too much if you have a cold. I have one now and it is killing me to NOT play with Measley. She actually gave me a cold last year!
Just try to relax and watch for environment and diet. My father raised ferrets and we usually had 25 at a time. They can fit into holes the size of quarters so be aware.

Yeah, I'm sure he is too thin. He weighs only one pound, he's usually about 2.5-3.5 lbs. He is literally skin & bones, you can't see of feel any muscle or fat.
I feed a mixture of excellent quality foods (no offense but chefs blend is one of the worst foods to feed a cat especially a ferret). Ferrets are 100% carnivores, they have no cecum which is what digests non meat materials, chefs blend has a lot of non meat ingredients. he eats a mixture of Innova cat, Innova Evo, Zupreem ferret food, TFS ferret food and sometimes I add CSFTKLS &/or felidae. He also eats a lot of raw meat & some really nice douck soup.
Like I metioned before, ferrets can NOT digest any non meat foods, so giving him raisins & other fruits is a BIG NO NO!!! Raisins, not only can they cause blockages but they are so loaded with sugar that they can cause insulinoma too.

He's not a free roamer but is allowed free roam of the house for at least a few hours a day. He hasn't been out much since he got sick, he just can't handle it and doesn't even seem really interested in running around much anyways.

Actually the meds he was on should of helped him. Besides he was sick before I started him on meds.