Preface: I have four chipmunks but this only deals with two of them. Two females were bought from the same place at 2 months old and kept together until just days ago. Before separating them I noticed that one, Luci, was lacking fur on one of her chipmunk-cheeks and a small spot on the side. I didn't think much of it then because the other female had been picking on her so I attributed it to scuffles. Then I moved Luci into her own home, yet the spotting has not stopped but persisted further. Now I'm getting a bit worried.
Problem: The skin itself is lacking in fur - but only that; there are no scars or wound marks, there doesn't appear to be swelling, and there aren't any visible parasites. The spotting itself is sparse, only in a few spots like the cheek, on a leg, the side, to make about 4 different small trouble areas. Luci has always been a scratcher, if that matters?
I've ruled out the idea of something contagious since the two females were kept together so long, and during the early symptoms, that if Luci was contagious the other would be sick by now for sure. The diet has been identical except for personal tastes - one I wonder if it is particularly important? Luci hates corn (she instead stuffs on sesame seeds), yet I know corn is important for their fur. The other female eats corn, and has a beautiful coat, so I thought perhaps it was that? I recently fed her two pieces of specially made chipmunk corn bread hoping that will help but I want other opinions. What is the deal with this chipmunk?!
PS: I can't take pictures now but I'll do so tomorrow so you can see for yourselves what it looks like.