I am a new member and need help with my new flock. I have had some experience with chickens, having bought a house last year with a large coop and 4 chickens in the backyard. I retired the chickens last fall to a small local farm and waited until this spring (2017) to start again with a new flock. Three weeks ago I purchased 2 rocks, 2 Wyandottes, a Welsummer and an Austrolorp. They were between 10 and 12 weeks old and all from the same breeder and kept together in the same large flock of juveniles. After 5 days, I found the smallest chicken, a Wyandotte, dead in the coop. There were no visible signs of pecking or feather damage. I thinks she was kept from feeding and drinking by the other chickens. Had her checked out and she had no disease. A week later, a Rock (next smallest) died with some visible damage (feathers missing, raw spots on her back). It happened very quickly. This seems more than normal pecking order establishing. Now there are 4 left, with the remaining Wyandotte being pecked by the 3 other chickens. I tried a method I found on another site, which was to watch them closely and use a spray bottle of water as soon as any chicken pecked at her. I have been doing that. Don't know yet if it is helping. I think I can identify two "ringleaders," the third chicken rarely pecks another. My question is, What do I do with the remaining rather aggressive chickens? Can I chance introducing new members? Or should I retire them and start fresh with 6 new full-grown chickens?