Racehorse pee

As a horseman with over 25 years in Thoroughbred racing, I’ve seen my share of trackside quirks. One question stands out: why do racehorses pee so much? It’s a common observation, and the answer is more complex than you might think. Racehorses urinate heavily, especially post-Lasix, producing 8–12 gallons daily without medication and 12–18 gallons …