I hope this goes here. I acquired a new hen, she is a commercial grade pure bred White Leghorns from a breeder who is developing a new line of layers for the vaccine industry. She was kept in a pen, under lights, with 50 hens and 5 roosters in the cage. She has no feathers on her back due to heavy breeding. She looks really pathetic with no feathers and a dubbed comb and stubby beak!
She was blood tested for all kinds of diseases (all negative) right before I got her, so because she is used to the lights, and has no feathers on her back, I put her in the pen in my garage with my 9 week old pullets who I still have heat lamps on (yes, spoiled). I thought this would be better than outside and almost naked
Also, when I got her, they mentioned that because she was in such a controlled environment, that she is much like a chick in that she was not exposed to other chicken 'stuff'. This also factored in my decision to put her in with the chicks. Unfortunately, she will be eating medicated chick crumbles during this time. So far she seems to like the chicks, they are getting along well until she tries to roost and they peck her toes hanging over the roost pole.
My questions-
How long will it take for her feathers to grow back?
Due to the medicated feed, I plan on scrambling and feeding back any eggs I get from her during this time, but what is the withdrawl time after I switch foods to non-medicated so I can start eating her eggs?
After her feathers grow in, and the chicks are a little bigger, I plan on acclimating them to the outside, and then moving them outside with my 2 big girls, they will have a coop and a large fenced backyard to roam. Any advice in acclimating the leghorn to people and freedom is greatly appreciated!
She was blood tested for all kinds of diseases (all negative) right before I got her, so because she is used to the lights, and has no feathers on her back, I put her in the pen in my garage with my 9 week old pullets who I still have heat lamps on (yes, spoiled). I thought this would be better than outside and almost naked

My questions-
How long will it take for her feathers to grow back?
Due to the medicated feed, I plan on scrambling and feeding back any eggs I get from her during this time, but what is the withdrawl time after I switch foods to non-medicated so I can start eating her eggs?
After her feathers grow in, and the chicks are a little bigger, I plan on acclimating them to the outside, and then moving them outside with my 2 big girls, they will have a coop and a large fenced backyard to roam. Any advice in acclimating the leghorn to people and freedom is greatly appreciated!