hi eveyone, i had( 4) 7 week old chicks untill yesterday they were hanging outside in their day pen i bought from co-op. Well, even though one of my barred rocks was 2x the size of gap in pen he squeezed through it and hopped the fence and the neigbors dog got her. all of that happened in the 5 min i went to get them some more water. so now i want to add another chick but the flock. All I can find is 1 month old brahma. I asked a local farmer if he had any their age and he is checking but if not how would i go about introducing a light brahma to a flock of: 1 rhode island red, 1 barred rock, 1 black star that are all 7 weeks? they will be going in their coop this week, with a night heat lamp due to cold nights. please letme know soon there is only 1 brahma left and then there is only chicks available. Thanks. Lindsay by the way we are correcting fence and pen issue before they will be able to go out again.