Watch the Hay Net
It’s a good idea to provide your horse with low-dust hay in the trailer, whether you’re going on a short or long journey. That quick trip to the veterinary clinic can unexpectedly turn into a longer time away from home if you experience a breakdown.
Free-feeding hay will help keep your horse calm in the trailer and will keep his digestive tract moving, which will help prevent colic.
However, if you put hay into a hay net, be sure you don’t overstuff the bag. Allow enough room behind the net so your horse can move his nose, so his nose isn’t pushed into the bag. And make sure the bag is high enough so that he won’t get a hoof tangled in it. Finally, tie your horse so that he can put his head down to remove any hay dust and debris from his lungs, but again, not with so much slack that he could catch a hoof. — Julie Goodnight; JulieGoodnight.com
Make sure your hay bag doesn’t take up too much room — and cause your horse to be uncomfortable during a long ride.