We have 5 hens in a small residential fenced in backyard. They haven't done too much damage. They like to stay around the perimeters and dig and scratch in the dirt under our trees and shrubs. I have my veggie garden fenced off as I REALLY don't want to take chances with them enjoying it. I do'nt think you can really train them to stay away from places, just use some fencing. Since our yard is fairly small, and I have kids, I'm a little nutty and I'm out there multiple times a day cleaning up chicken poop. I'm trying to keep the flies away and my kids poop free.
I hose off the patio at the end of everyday. You could do a chicken tractor and move it around the yard or fence off an area in your yard for a large run for them. We do the chicken tractor, but I still let them out a couple times a day to hang in the yard. They like it.
