Gerbil has weird bald spot?

[Bob]

My gerbil is 1 year old, and he has a small spot on his stummy where the fur from both sides begins to close in on eachother, leaving a little tiny bald spot. I think its normal because other male gerbils in photos have it, but im still worried. Is this something to be concerned of?

 

[Hays]

If it stays small you shouldn't be concerned. If it grows larger take the poor boy to a vet that has experience in treating small animals. My mouse had the same thing but she died