There are several types of trailers; they are of many sizes from small to huge. Some of them even have owners quarters or a groomsman's room adjacent to the horse section. There are the horse carrying motor home style vehicles too. For highway speeds and to go any distance, it is best to use a large towing pickup truck specialized for such use. The best are the dual tired big pickup trucks called Duelies. You then get a big sturdy support hitch mounted in the pickup bed and the trailer has a long hitch stalk that projects into the truck bed. This type, called a goose neck trailer with a 5th wheel hitch, will give you excellent stability and a shortened turn radius. It is also virtually impossible to have a trailer disconnect from the truck -- which is a worry with pull-behind trailers.

Before you take your horse for a first trailer ride; you should ride in the back of the trailer, while someone else drives the truck, so that you can experience the cornering and braking calamities that the horse will experience. Some folks put leg wraps on their horses when trailering to help protect the horse more from accidental braking, cornering, or bumping. After you have ridden in the moving trailer yourself, take a few practice runs with you and the horse -- so you can see what the horse is experiencing as a driver drives, turns and brakes. And it would be a good idea to next have someone else ride with your horse while you drive. One of my friends had a good technique; she put a long stem wine glass on the dash of her truck and filled it with water. She then learned to drive without spilling the water or turning over the glass. Personally I think it is a great technique to practice.

You also need to keep the trailer clean, especially keeping it free of hay dust and dirt. Remember when the trailer is underway and if the vent windows are open, whatever hay and dirt there is inside will start whirling around in the trailer. Keep everything well tied down inside too; falling, and swinging articles in the trailer can spook your horse and cause him to jump and hurt himself.