Do you think it's a grizzly or a black bear? I've never had to deal with bears, but I thought they slept through the night, napped during the day, and hunted at dusk and dawn. I would be afraid of having a bear that close. Do you have a rooster? If the rooster attacked it would surely escalate the situation. But then again, I'd assume the bear would kill them and eat them anyway if it could. Gosh, I'm sorry you're dealing with this.