A couple of weeks ago I noticed that my biggest boy (Orion) had two sparse patches on his belly. One on each side, right around his hip area, just below his "belly button". They're not completely bald spots, but they're quite obvious circular patches with less hair. Seeing this, I looked at my other three and they all have them too...exact same spots, exact same appearance. That's three boys and one girl. At first it was a bit of relief to see that others had it too, but then I looked at my boyfriend's ferret and my rescue. Neither of them have the patches...Now my boyfriend's is still very young (~3 months old) and we have no idea how old the rescue is. The oldest of my four is almost a year old and the youngest is about 8 months old.
The patches haven't changed in appearance. They haven't gotten bigger or smaller since I noticed them. Should I be worried about this? I've read up on adrenal tumors, but 1) it seems highly unlikely they'd -all- have them and 2) the spots are so symmetrical and similar on all of them, it doesn't really sound like what I've read. Are these patches normal on ferrets or is a quick trip to the vet in order?