The hard keeper gets harder to keep
Most senior horses fight their waistlines; the Thoroughbred fights the opposite war. A metabolism bred and trained to burn feed at racing speed does not retire when the horse does, and age adds worn teeth, a fussier appetite and a gut that has often lived with stress. The result is the senior who eats respectably and still drops condition — ribs showing through a coat that used to shine, topline melting off a back built like a bridge. Senior Thoroughbred care is therefore a feeding campaign run with patience: calories in forms his teeth and stomach can actually use, weighed and adjusted by what the weigh-tape says rather than by what the bucket looks like on any given morning.
Old racing wear: joints, back and feet
Even a lightly raced Thoroughbred carries a young athlete's mileage, and it surfaces in the senior years as joint stiffness, a back that resents a cold-backed start, and feet that were always the breed's weak point — thin walls, flat soles, a talent for pulling shoes. The senior farrier plan matters: regular cycles, an honest conversation about support in front, and footing chosen kindly. Stiffness that warms out with walking is managed with movement; stiffness joined by heat, swelling or a sudden change in how he bears weight is a veterinarian call instead. Many ex-racers stay rideable and happy for years when the work shrinks to match the horse, rather than the horse being asked to keep matching the work.
Feeding for weight without upsetting the stomach
Forage first, and nearly always in front of him: a Thoroughbred stomach is small, ulcer-prone and built for trickle feeding, so hay or grazing access around the clock suits him far better than two large meals and long empty hours. Calories climb through fiber and fat rather than big starch loads — soaked fiber mashes and senior feeds designed for worn teeth let him eat at the speed his mouth can manage, and choke risk falls when everything arrives soft. Introduce changes over a week, feed the ulcer-prone senior little and often, and blanket honestly in cold weather: a thin-skinned horse with shrinking fat reserves burns feed just standing warm that should have gone to his ribs.
A long paper trail, finally in one place
A senior Thoroughbred's history is longer than most: racing injuries, post-racing retraining, then a decade of ordinary life. That history changes what a veterinarian makes of today's stiffness or weight loss, and it is usually scattered across old yards and older memories. Call promptly if weight falls despite a full and eaten ration, if he quids or coughs at feed, or if appetite itself fades; in a hard keeper, those are early alarms, not quirks. Assembling it all — vaccination record, dental charts, bloodwork, the story of the old tendon or the knee that was always watched — into a KinsLe Pet Passport gives the vet the whole horse at the first visit.