We have 1 leghorn hen that needs to be added to the big coop with the other bigger chickens. We got her in November with her 4 leghorn siblings. They were all about 1-2 months old I believe. Since then 2 of them didn't make it. About a month ago Teeny, I call our leghorn hen, became malnutritious. She's always been the smaller one and I'm guessing her siblings started keeping her from getting enough food. I found her one day laying in the little coop and thought she was dead, she laid on her side for days and couldn't even sit up. When I found her I took her inside for 2 weeks and kept her in a dog crate until she was able to walk around some then. She was walking very well except it was kind of like she was drunk because she crossed her legs. Anyways, since then, her remaining 2 siblings were added to the larger coop, and now that she's back outside and in the little coop by herself, running and even perching again, I'm wondering how to go about adding her to the big coop eventually?? I think she should be about 4-5 months old now. The big coop currently consists of 7 chickens: 4 roosters & 3 hens. I know for sure that 5 of the 7 chickens are 1 year or less.