As summer approaches, days get longer, the weather gets warmer and people look forward to horseback riding – maybe even going for a ride on the beach. Yet, for some horse owners, summers are synonymous to despair. Those who have anhidrotic horses, or which the sweating ability seems to shut down during hot or humid days, are desperately trying to keep their horses cool, comfortable, and alive. However, unfortunately for some, that situation happens all year long. So, what causes horses to stop sweating and why is sweating so important?