Why Do Racehorses Pee So Much?

HISA Regulatory Update 2026 HISA Lasix Rules: Stakes Races Banned, Claiming Races Still Permitted HISA now bans race-day Lasix (furosemide) in all stakes races and two-year-old events at federally regulated tracks. Horses that previously ran on furosemide in these conditions…

About Horse Racing Sense

Horse Racing Sense is written by Miles Henry — a licensed Thoroughbred owner and breeder who has raced horses at Fair Grounds, Delta Downs, Evangeline Downs, and Louisiana Downs for decades. Every article on this site is grounded in hands-on ownership experience, not secondhand research.

The site covers horse racing betting, handicapping, racehorse ownership, breeding, and racing history. Our content has been referenced by Wikipedia, Inside Edition, and multiple publications. Miles has also appeared as a guest on podcasts discussing ownership, handicapping, and the realities of running horses at regional tracks.

If you're learning to handicap, thinking about claiming your first racehorse, or just following the sport seriously — this is the right place to start.