GreenGuard Grazing Muzzle

GreenGuard’s differentiators can be summarized in three words: breathability, durability, and freedom. The square, tapered shape allows for more breathing room, and the open design allows a horse’s jaw to move freely inside the muzzle. The multiple-openings design supports more natural grazing behavior by allowing the horse to choose where to graze.

While horses can drink water in their muzzles, some automatic waterers have too small of an opening for the muzzle to fit. We recommend measuring the opening of your waterer and comparing it with the size of the muzzle your horse would need. Ensure there is space for your horse to press deep enough into the waterer to get water and enough space on the side for the corners and straps not to get hung up. Waterer models may change over time, so double-check specs before you buy.

Auto-waterer sizing reference:

• The largest size of GreenGuard Grazing Muzzle is Size 5 (Horse), measuring 6.25" x 6" around the outside base and 7.5" on the diagonal (bottom surface). The muzzle tapers upward and outward from the base.
• Ideally, the waterer opening should account for those measurements, plus 1" for clearance.

At a glance (waterers):

Compatible: Behlen AHW Series, BT Suntank, Cobbett SB and LB, Equuspring, Hoskins, Jug, Miraco Lilspring, Nelson 760, Ritchie Omni 3 and Omni 5, Ritchie Thrifty King CT2-2000*, Varnan

Not Compatible: Behlen energy-free, Bar Bar A, Drinking Post, Miraco E-fount and MiraFount Livestock Water Systems, Nelson 730, Ritchie EcoFount and Ritchie’s UltraFount, Omni 1, Omni 2

*Works for some muzzle sizes.

Yes—GreenGuard muzzles can work for donkeys. Please make sure to accurately measure your donkey’s nose circumference and muzzle width/bit size.

Note: Donkeys and mini donkeys may need extra safety consideration when sizing and fitting. Due to their smaller hoof size, keep the distance between the halter noseband and the muzzle as short as possible while still ensuring a proper angle adjustment.

Horses should be able to graze on grass that is at least 3 inches high, though an ideal height is between 4–10 inches. As a rule of thumb, grass should be at least 3–5 inches tall before you start using the muzzle.

If grass is too short or sparse, your horse may become frustrated. If needed, let your horse practice on grass that’s a little taller or less sparse. Monitor your horse closely and consult your veterinarian if you have concerns.

Grazing muzzles typically restrict about 30%–70% of grass intake compared to grazing without a muzzle. The amount of restriction depends on the horse’s personality and environment.

• Diet inserts can make the muzzle holes about 50% smaller.
• A leather insert can restrict about 30% more.

GreenGuard muzzles are made of high-quality, non-toxic, food-grade polyresin and are manufactured in Europe. Like most materials, prolonged direct sunlight can warm the muzzle. However, the increased breathing room, airflow, waterproof material, and a horse’s constant movement while grazing help the muzzle stay much cooler than a traditional muzzle in summer conditions.

While the muzzle was not designed specifically for hay, many horses do fine eating hay through it. You can push hay through the holes to help your horse understand how to eat through the muzzle if they struggle at first.

Combining the muzzle with a slow-feed hay net or bag may make it more challenging for your horse to eat. Consider checking with a veterinarian or nutritionist before trying this to ensure your horse is getting enough calories to sustain a healthy lifestyle.