What can happen to an unfit horse's sweat?

• A. It becomes less watery and contains more salts and waste products, forming a thick, scummy lather.
• B. It becomes pure water.
• C. It evaporates immediately.
• D. It becomes sweet-smelling.

Answer: (A)

Sweating is a key way the body cools itself, and how sweat behaves changes with conditioning and hydration. When a horse is unfit, its cooling system isn’t as efficient, and more minerals and waste products get carried in the sweat. That makes the sweat more concentrated, so it appears less watery and saltier, and it can leave a thicker, scummy film on the coat as it dries or mixes with dirt and oils. This concentrated, residue-forming sweat is a sign of reduced conditioning and can be a clue that the horse needs careful cooling, hydration, and rest.