Hey Nancy. I know your a retired breeder, so my assumptions would be is that you would know.
I recently rescued a male hedeghog, i'm not 100% sure of his age, but his previous owners had him about 13 months, so i'm going to try and guess hes about 14-16 months?
Anyways, by his tail, he has a large bump, its under his skin, and doesnt bother him any. He's above and beyond active. Any idea's what it could be? His genitals maybe ? I've never had a male, so i'm not 100% sure. (: