the other day the human door to our coop was left open all night. luckily nothing but a bad scare to us happened. When we went down to the coop all the chicken were gone but they had just started free ranging behind where we couldn't see them. I have all kinds of critters and have lost chickens to other animals so I was quite suprised to see them all safe. My coop is quite tall and the roost is about 51/2 feet off the groud, I have another roost about 3 feet but they never use it. Is there anything I can do to make this roost racoon proof in the case a door was left open again? The coop is only 4 feet wide so I don't think the chickens can reach that taller roost without the 3 foot roost.