Last week one of my 15 week old pullets passed away.. I think she tried to roost on a piece of wood board the was propped up on the fence and it fell on her while I was at work. I didn't think that was going to happen.. so today I went and got another hen, a Rhode island red, she's five month old. Well I put her in the run with my older girls (5 of them) and they all attacked her!! There was blood shed.. so I took the new girl out and put her with my 4 15 week old pellets.. is this a good idea? How long should I keep them separated? I don't want to keep her by herself.. she did okay with my pulleys only because they run from her. I had to put her in the coop with the pulleys because she was hiding outside behind the coop when it got dark, can anyone give me any advice about this situation? I'm kind of stressing out.. Thank you!!