Yesterday I went to get some new pullets, trying to build up a flock. I had gone for some 5 month olds, but when I got there, they were all gone
so I ended up looking at the 8 week old group. This group was younger than I preferred, but included four breeds I was seeking-- so I came home with a Blue Cukoo Maran, a Barnvelder and two Easter Eggers. I'm sure hoping they are really pullets, because the 5 I got earlier this year ended up having 2 roosters. At any rate, they were all bright, alert, clearly eating and drinking well. But most had missing feathers. The ones I brought home are all missing tail feathers, and some are really bare on most of their back if they spread their wings and uncover it. They were eating pellets, but I'm giving them Klambach 20% chick starter and they are eating it well. Gave them some mixed grubs and mealworms and they cleaned those up. Put electrolytes/vitamins in their water, and they are drinking well. I believe the missing feathers were due to about 125 8 week olds being in a shelter/run that was maybe 400 square feet- crowded. And they had just been moved up to this bigger run, the previous run was probably 250 sq feet.
They are quarantining in 144 square feet, so plenty of room. They have not been handled, so are very wary of me. But I'll go and sit quietly each day and they will learn that scattering meal worms means treats rather than act terrified. Is there anything else I should do for their feathers? They've never had a roost, so have shown zero interest in the roost. Not sure I could catch them without a net at this point so I'm mostly seeking remedies I can put in their food or water, if high protein food and snacks are not all I should be doing.

They are quarantining in 144 square feet, so plenty of room. They have not been handled, so are very wary of me. But I'll go and sit quietly each day and they will learn that scattering meal worms means treats rather than act terrified. Is there anything else I should do for their feathers? They've never had a roost, so have shown zero interest in the roost. Not sure I could catch them without a net at this point so I'm mostly seeking remedies I can put in their food or water, if high protein food and snacks are not all I should be doing.