Grazing muzzles are a staple in the tack room of many pony and horse owners. These muzzles fit over the mouth and nose of a horse and restrict grass intake while allowing access to pasture.
Grazing muzzles have been shown to reduce dry matter intake by between 30 – 80%. These devices can help prevent laminitis and obesity in horses or ponies by decreasing calorie and sugar intake.
If your horse is over-conditioned and needs to lose weight, using a muzzle while on pasture will help you manage your horse’s weight without needing to isolate them to a stall or dry lot. 
Grazing muzzles allow the horse to be turned out in a herd, enabling social interaction and providing more space to move around. These devices are safe when used properly and have not been shown to cause psychological or physiological stress in horses or ponies.
This podcast reviews how and when to use a grazing muzzle.
Read more: https://madbarn.com/grazing-muzzles-for-horses/
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