Ok folks, this is my first time to post any thing; so bear with me. I have just under 400 birds of different breeds, my plan is to sell them as young pullets(4-5 mo old) but until they are that age, I need to build a few heaven-duty portable coops to house them. They are from different hatch dates, so their ages range from 3 month old to 2 weeks old. I have 30 acres of flat pasture that I’d like to move them around, but have a lot of wild predators, so would need a vermin-proof design. Also, I need a rough idea on how much room each chicken would need so as to not pick on each other. Once they are big enough I will let them range in a electrified poultry net, but I am stumped on the size and design of the coups that I need. Any help would be appreciated, thanks for your time you guys!