I'm purchasing several Nubians. Our barn is a pole barn 12' high, 25' by 25' wide and enclosed on three sides. Unfortunate the one open side faces north. We live on the Gulf coast and it seldom freezes but the wind does blow a lot. I'm concerned they may get cold in the winter. I am wondering if I should build a small shelter with in the barn. Would a shelter 4'x4'x8' and 4' high with a plywood roof be ok? I don't know if that is high enough to give them head room and would they be able to jump on top and then hurt themselves jumping back off? I don't want any sick goats or broken legs. I though 4x4x8 would be easy to make out of 4x8 sheets of plywood.