TRAILERING When to blanket in the trailer

Q:I have a 23-year-old Quarter Horse, Dillon, who routinely wears blankets in cold weather. Every four weeks, I trailer him down to Rood and Riddle in Lexington, Kentucky, for his routine farrier work. I “horsepool” with another owner in her bumper pull, which is not as well insulated as my gooseneck trailer. (I’d prefer to use my trailer, but her horse won’t load in it.)

Should I blanket Dillon in the trailer when the temperatures are going to be at or below freezing? I have a range of options---including a “cooler” for after workouts as well as three blankets intended for 40-degree weather, 30-degree weather and 20-degree weather. Your advice would be greatly appreciated. Lisa McKeirnan Cincinnati, Ohio