HELP. Missing Fur on a Baby.

[ccchins]

I noticed this patch of fur missing on one of my 1 month old mosaic males. Does anyone have any clue to what might have caused it? Him and his brother get along so I don't think it is fighting. Momma is good to both boys. Is it a fungus? I know it might look like a bump in the second picture but I assure you it isn't. Thanks again everyone.

Sent from my iPhone using Tapatalk

 

[Narcissus]

Looks like the kids are fighting to me. Watch them carefully!

 

[Cuddlebug]

I would keo a close eye on them. That mark in the middle of the bald area looks like a bite mark to me.