I'm new to Backyard Chickens and I have a couple of questions.

[flyingdutchman]

I've got RIR pullets but have added Black Jersey Giant chicks to my flock. What size opening in the coop will allow full-grown BJG to come and go. Also what size nest boxes?

 

[greymane]

I would look under COOP AND RUN - DESIGN AND CONSTRUCTION in the RAISING BACKYARD CHICKENS section for the best information. Good luck with the coop!!