Hello everyone. I'm very new to the chicken world and I must say I love it. I have 5 girls ranging from about 8.5weeks to 13weeks. I have 2 Wyandottes (silver and gold) and 3 cross breeds. First is very similar to an Australorpe (all black and tint of green and almost a reddish colour), second is a Isa Brown and 3 is an Isa Brown X Australorpe by looking at her. Please forgive my lack of knowledge when it comes to the exact terminology. We r building our own coop and am wondering Wat size should our beating boxes be??