How can grooming affect a horse in cold weather?

• A. It increases the coat's thickness.
• B. Dried sweat can soak the hair coat, removing its insulating qualities and making the horse susceptible to chills.
• C. It has no effect.
• D. It causes the horse to overheat.

Answer: (B)

In cold weather, keeping the coat dry is key to staying warm. The insulation from a horse’s hair coat works best when the skin and coat are dry because the trapped air between hairs acts as a barrier to heat loss. Grooming after work helps by removing sweat and assisting the coat to dry. If sweat dries on the coat but leaves damp patches, that moisture can soak into the hair and reduce its insulating loft, allowing heat to escape more easily and making the horse feel chilly. The practical takeaway is to rub down, towel off any damp areas, and ensure the horse is completely dry before blanketing or turning out, so warmth is preserved. This is why dampness from dried sweat is the best explanation of how grooming can affect a horse in cold weather.