Big Chickens - Dottes/RIR/Leghorns!

My dad made it, it was our 1st coop so it isn't that great, He's in the process of building 2 more; they're gonna have an automatic door opener! It' gonna be awesome...We have 30 chickens right now, 14 teenagers, 2 2 wk olds, & 10 full grown ones., & 4 10 month old seramas!