Balding? Is this normal?

[Carolinelilly77]

Hello! I am very new to raising chickens, and our babies are not that old. But they seem to have a blad spot on their lower back. I'm not sure if it is normal or not, or if it is because their living close together while we make their coop.

 

[Poultry parent]

It's probably just feathers growing in, though it could also be that they're pecking each other