A few weeks ago I purchased a yearling who had been raised in Texas and brought him to Montana. It has been an unusually cold fall here in the north. This colt has not grown any winter coat at all in the three weeks he has been exposed to our northern climate. It only takes a few days of cool weather and our other horses almost instantaneously hair up. He is turned out 24/7 but is being blanketed at night. I'm trying to acclimate him to our weather in this way but no change since he left TX. Is it possible he just won't grow an adequate hair coat this year?