We lost Lulu today and it was my fault I recently purchased 3 Blue Ameraucanas, a Roo and 2 hens, from another BYC'er. I was going to build them their own breeding pen/coop, but then wondered if I could just mix them with my flock of standard hens/pullets. I had the 3 blues out free ranging and thought I would let the big girls out and see how their first meeting went. There was a few minor tiffs, but nothing like I was afraid of. After an hour or so we rounded them all up and put them in the big run together. We supervised them for a little while and then left them alone and came back inside. After an hour or so, I kept hearing the roo crowing over and over and then the hens started making their warning cries. I ran outside and Lulu was laying in the run dead. She was missing a patch of feathers on her back, so I am assuming the roo was trying to mate her and broke her neck. He is my first roo, so that is only my best guess. Her head was really floppy. I was afraid of fighting and expecting to see some wounds, but I had no idea he could actually kill any of the hens. I feel horrible now, but even moreso because Lulu was my 8 yr olds chicken. He had latched onto her from the day we got her in our very first ever shipment from MMH. Makes it worse is that I had 7 like her and we only kept her for my son. I need to find him a new Polish now. I have one hope and that is a friend of ours who we gave 3 of our Polish to last Summer. I am hoping they kept one like Lulu and will be willing to sell it to us. DH is going to call them in a bit and see Ugh, this chicken stuff is not easy!! Needless to say, the trio of Blues are back in their own coop and thats how it will stay. Tough lesson! Thanks for listening.