I have 6 Wyandottes that I got all together. One was smaller and just doesn't grow as fast as the others. I picked her up yesterday and her breast bone is sticking out and she is just skin and bones!!! She looks normal until you pick her up. I bought wormer today but she doesn't want to eat the pellets. I confined her in a dog crate last night and she ate well. Today it was real hot so I put her with the rest of the girls and all was fine. Got home after dark and all were in the coop except her. She was under it crying. I put her in but she acted like she didn't want to go. Finally she went in to sleep but the others started pecking on her hard so I removed her. What can I do now?