Is my horse too thin?
Don't rely on a winter hair coat or a single glance. Put your hands on your horse and assess body condition consistently.
Quick answer
The Henneke Body Condition Score uses a 1–9 scale. University of Minnesota Extension describes 4–6 as an ideal range for many horses, with 5 considered moderate. The right target can vary with the individual horse.
Feel six areas: neck, withers, behind the shoulder, along the back, ribs and tailhead. A thick coat can hide changes that your hands will detect.
Is my horse losing weight?
A body-condition score tells you condition today; repeated measurements tell you direction. Check on a consistent schedule and use the same method. A weight tape, heart-girth/body measurements, photos taken from consistent angles, and BCS can all help reveal a trend.
A drop from a previous normal condition matters even if today's score is still within a commonly acceptable range.
When to investigate
Unexpected or continuing weight loss deserves attention rather than simply adding a heavier blanket. Dental problems, parasites, pain, digestive disease, metabolic disease, competition for feed and inadequate intake are among issues a veterinarian or equine nutrition professional may investigate.
Why this matters in cold weather
Body condition is one of the factors that changes how well a horse tolerates cold. Recheck condition regularly during winter because a heavy coat can conceal loss.
Sources
University of Minnesota Extension: Caring for the underweight horse
University of Minnesota Extension: Estimating actual and ideal bodyweight
Educational information only. Contact your veterinarian about unexplained weight loss, illness or other concerning changes.