hello...I just brought home 12 buckeye laying hens, about a year old and decided to try using an unused boat(34' cabin cruiser) that is in the yard as the coop. nothing to build so I put a bail of straw around the cabin floor and turned them all loose inside and on the back deck and went on a break. when I came back some had jumped to the ground and where exploring the garden. I put a ramp up to the transom. after dark I came back to check on them and 4 had jumped into the back of pickup truck(from the ground) and where sitting in a pile. the first question I have is 7 ft. up from the ground too high? I thought they would be safe from the critters here in Ill. will post photos when I am allowed.