We have a friend that keeps a large henhouse & fenced in area... They actually have hung a small birdcage in the top of the coop(where the chickens cannot fly) and have 2 zebra finches living in it. They leave the birdhouse door open & the finches fly around the top of the coop and perch on some ledges that they have built for them. So my question is this: is that a bad idea? Will the chickens try and kill the finches(they havnt had any trouble yet)? Is that bad for the finches? Thanks!