You can leave her in the coop as long as she stays on a nest well. You may have to check her to make sure she only has the eggs you want hatched under her since other hens may lay int he box she is in as well. The easiest way to make sure she has only her eggs is to mark the eggs you put under her. You can put an X on them or the date you put them under her on them if you like. With out last broody she stayed in the coop in our normal nest boxes till a few days before her hatch when we moved her to a broody box so she has room and privacy for hatching. This time around we started our broody off in the broody box because she is a big meanie who will try to take a body part off if you mess with her so we just moved her ahead of time rather than having to move her and mess with her multiple times. If you do the dog kennel keep it in the coop area with the other chickens so she is still part of general population but seperated at the same time. It makes it easier when you let he rejoin the flock with chicks if they still consider her part of the flock.i have a question. should i put the broody hen in a different place? (like in a dog kennel in the garage) or can i just keep her in the coop?