[header] How to train a horse to trailer [title] Give the horse a bucket of treats each day. [step] Drop a few oats into a bucket and leave it at the horse's bedtime stall each morning. Repeat this for several weeks, to get the horse comfortable and excited when he sees the bucket. 
[title] Gradually move the bucket into the trailer. [step] After several weeks, place the now familiar treat bucket inside the trailer.