I got sevral sooo sit tight
* dress your horse up as a angel and you put on a devil costume
* put a orange blanket on him and you wear a basket ball jersey
* wear a swim suit and put a towel on your horse and a wistile on your rains goggles on the horse work good to
* Another costume idea is a knight in shining armour. This is very easy get a stable sheet or blanket, put it on the horse put the saddle over it, get synthetic bridle that matches. Got to a halloween shop and buy a knights costume and get a fake sword.