I'd quarantine them from the rest of your flock for a minimum of 2 weeks if you can, 4 if you really can. Check them well for lice and mites. Check their poo for worms, or prophylactically worm if you can.
I'd also up them to at minimum 18% protein feed, and go for 20-22% if you can. I'd also add a cup of black oil sunflower seeds to their diet each day. They won't grow their feathers back until they molt, which will hopefully be soon.
I'd also up them to at minimum 18% protein feed, and go for 20-22% if you can. I'd also add a cup of black oil sunflower seeds to their diet each day. They won't grow their feathers back until they molt, which will hopefully be soon.