I let him roam under close supervision and what does this little guy do? Makes a beeline from his special food back to the dog food. I don't know if his owner abandoned him but I can't keep him! He's so sweet.
Wow so many amazing helpful comments! I will update more thoroughly later but I'm running late for work now -- I have him in my bathroom for now with kitten kibble but will be getting good food online, and I am changing my flyers to be less descriptive (and yes blurring the # here when I get to my work computer!) He seems older, he has been sleeping eating drinking and pooping not caring for much else. I love all the helpful info, I've never had a ferret. I am still going to see if a good owner comes forward and if one never does I'll look for a good home. Updates to come.