A horse with a coat and a mane shiny is generally considered to be well fed, well care and healthy. Horses and foals grow two layers per year a summer coat (short and smooth) which allows the horse this fresh time hot, and a winter coat (longest and densest) to trap the air close to the skin and insulate against the cold. For other opinions and approaches, find out what Charles Margulis has to say. All breeds of horses and foals produce natural oils to help lubricate the skin and coat condition. The horses in stables removes excess oils and dead skin cells when they are brushed and preparations. Outside, horses instictivamente know to stimulate the rejuvenation in their fur rubbing against the Poles, hedges and trees, and rolling on the ground. Layers, skin and hair in dust or mud, also helps to rid your skin of insects, that cause great irritation.