I had a predator problem and lost 50 of my teenagers last month... The ones that survived with wounds I washed with peroxide without any issues and covered the wound with a good dose of A & D ointment... They healed very quickly... And yes separate them from the flockbto avoid further pecking.
I realize this is 2 years later but wanted to let you know about our first experience with layers..... We got ours in April of 2013.. It was November before we saw any eggs at all... Now they lay daily. That is except for the 3 that turned out to be roosters. In fact they did not start laying...