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Rodents would steer far clear of a flock of chickens if it knows what's good for it, your biggest concern would be foxes and other predators, wherever you set it up do yourself a favor and also set up a 'run' with some fencing of some kind. I prefer electric poultry netting because it's movable and I like to move my birds to different spots on my property. Doesn't do much in the way of aerial predation defense but that's why I've got my roosters with the girls, they do a great job of letting them know if something is wrong.
Pecking order is a thing, don't freak out if one or some of your birds looks like it's been in a bar fight, that's usually either the sign of pecking order getting established, or your girls are belting out the eggs and you need to up the calcium in their feed... if your birds are fighting to the point of actual injury have a place set up for your injured birds to lay up until better. Make sure they have grit and a dustbox available at all times, for the love of fuck make sure the birds have adequate ventilation in the coop, poultry are extremely sensitive to respiratory issues.
If you live somewhere that gets cold overwinter get birds with cushion or pea combs as they're less susceptible to frostbite, if you live somewhere hotter you're better off getting birds with the larger combs. The Small Scale Poultry Flock by Harvey Ussery is a great book full of info if it's just a hobby thing. If you want to get more into the business end of things I recommend checking out The Call of the Hen by Walter Hogan, useful info on evaluating which birds you want to keep for production purposes and which you want to cull, etc.. also fuck any poultry that isn't heritage, avoid cornish cross and all that bullshit as those birds are so fucked with genetically that they can't even reproduce anymore, you're cucked into buying birds rather than raising your own from fertilized eggs. Good luck OP