
03/09/2025
This... from Dr. Lizzie. SO IMPORTANT!
Did you know most horses need to consume about 2% of their body weight in forage and feed (dry matter) each day to maintain weight and gut health?
For a 500 kg horse, that works out around 10 kg of dry matter daily and the majority should come from forage (hay or pasture).
Note: Some easy keepers do well with ~1.5% bodyweight, while others - like hard keepers, performance horses, lactating mares, or growing youngsters - may need to 2.5 - 3%.
Pasture Facts:
On good pasture, a 500 kg horse can consume 50 - 60 kg of grass in 24 hours, which equals 10 - 12 kg of dry matter.
But once the grass is shorter than 2 inches, even if it looks green, your horse simply can’t consume enough to meet their needs.
When that happens, problems start:
The stomach is emptier → higher ulcer risk
The hindgut runs out of fibre to ferment → triggering microbial imbalance
Gut motility slows → increased risk of impaction colic
Reduced gut fill → increased chance of displacement or torsion colic
Many owners underestimate just how much bulk horses actually need. I recently saw a horse whose owner was worried because manure output had dropped. After examining the horse, looking at the paddock, and reviewing the diet, the diagnosis was simple - not enough forage.