To help comb out tangles, or give your horse a smooth shine, special shampoos and detanglers will do the job.
Things to Consider:
Extra Moisture -- For shampoos that have dried your horse's coat a little too much, products can be added back into the coat that will give it a smooth shine.
Combing -- If combing out your horse's tail has become a difficult task, a detangler might be just what you need to get the job done quicker.
Itch Stop -- If your horse is scratching and has irritated skin, sprays can easily be applied at the source to help relieve itching.