My coops are probably 60' from the house in my fenced in backyard. My dogs do a good job keeping critters away.... Except coons and opossum. They climb the fence and head to the coops. Birds freak out and fly into the walls of the run. If they would pass on by like the fox, I wouldn't care, but they don't. Leah has gotten 3 opossum this spring and one coon. I see fox and coyotes every now and then outside the fence sniffing around, but they don't try to get past the fence. Don't think my dogs have see a bear. There around. They raid my dumpster every now and then.I had some coons ripped our duct work out one winter in a bedroom.One of them got cut and died under the crawl space.Yes they're relentless but thank God my chickens are hard to get so they hunt across the street instead of here.My coop is very close to my house which discourages them .I also have a Basset that goes ballistic anytime a critter come around.He's terrified of bears though.