Thanks for the responses - my gelding grows a thick drafty coat in winter. He lives in South Carolina where the winters are very mild. If there is snow or ice (rarely) he comes in, but reluctantly. There are small shelters to get out of the weather but he, for some reason, doesn't mind standing out in the rain. For the first six years of his life he lived outdoors. It took awhile to get him used to the idea of getting in a stall for feedings. Thanks for your help - there are so many varieties of blankets from $35 to $300. He is out with one other horse, so chewing each others blankets shouldn't be much of an issue.