Horse grass versus cow grass
Most horses graze in cow pastures and are fed hay or silage from those pastures. Horses find this grass very palatable, but it is actually far too high in energy (fructan) and contains too little effective fibre for them. This may make a horse sick, often leading to complaints such as laminitis or tying up. It’s for good reason that there is horse grass for horses and cow grass for cows. Your horse needs horse grass.