Bald Backs?

[dreamwallaby]

3 of my 5 hens are developing bald spots on their backs. It's one spot about a quarter in diameter. How visible are mites? or are they picking at eachother or is this normal molting/feathering for 6 weekers?
Thanks

 

[DaughterOfEve]

at 6 weeks it is probably just new feathers coming in. If they appear healthy: good appetite, active, it is likely okay. You could offer plain yogurt for extra protien, if you think they need extra help. Thats my best guess.
You may have a feather eater too?