All hens have severe feather loss!

[Loashparsons]

My husband and I are new to chickens and we have 12 hens and NO roosters. All of our hens have severe feather loss on their backs/butts and it’s getting worse.
Egg production hasn’t dropped off and there are no sign of pests.
Any clue what might help them?

 

[ChickenCanoe]

What is your location? Northern or southern hemisphere?
Lice, Mites?

 

[Loashparsons]

What is your location? Northern or southern hemisphere?
Lice, Mites?

We’re in Phoenix, Arizona! And no lice or mites from what we can tell.

 

[EggSighted4Life]

Any clue what might help them?

Hi, welcome to BYC!

Describe feed routine including treats and supplements.

Sometimes, feather (or hair) loss can be from diminished protein.