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ThinLine Flexible Filly Grazing Muzzle
ThinLine Flexible Filly Grazing Muzzle
Price £85.99 inc VAT

Softer, Smarter & Safer!

The Flexible Filly slow feed grazing muzzle is designed to be softer, lighter, and less behaviourally restrictive.


  • Safe and pliable food-grade material.
  • Infused UV skin protection.
  • No wear on equine teeth, comfortably soft on lips.
  • Well-ventilated, lightweight, flexible.
  • 2 grazing hole size options that can be modified to be larger.

Equine Behavioural Effects

  • Radically improves the horses’ ability to live a normal herd life in a muzzle.
  • Returns behaviors like wither scratching and play.
  • No fussing when putting the muzzle on.

Horse Owner Benefits

  • Your horse is both safe and comfortable.
  • You get the correct grazing hole size for all seasons, grass types, and hay.
  • Easy hydration with any bucket, trough, or automatic waterer.
  • Clear for easy monitoring.
  • You get to see your horse happy in a grazing muzzle.

What size should you choose? 

You can choose the same size as your halter.  So if you have a pony halter, you choose the pony Muzzle.  

What will you need?

We recommend you commit a dedicated well-fitting breakaway turnout halter to your muzzle.  It generally takes about 10 minutes to get everything perfect the first time you install a Flexible Filly Muzzle. Subsequent halters will take about 3 minutes.

How to attach your Flexible Filly Grazing Muzzle?

  1. Use the enclosed paper ties or a string to discover the best holes to secure your muzzle to your halter.  The paper ties are a temporary tool allowing you to easily adjust the fit.
  2. Two of the “fins” have a triangle cut out. These attach to the square (side) rings on your turnout halter. Three fins will connect to the noseband, one in the centre, the other two fall naturally to the sides of the centre.  Three fins will connect to the chin band; one in the centre, two naturally to the sides of the centre.
  3. First, secure each triangle cut out fin with one of the enclosed low profile cable ties.  Do not wrap the fins around the halter, doing so may cause rubs.
  4. When properly installed, the muzzle should be close to but not touching the nose of the horse. If the muzzle is touching the nose simply make the fins under the chin longer, this will lift the muzzle away from the nose.
  5.  Once you are satisfied you have the correct holes aligned to the halter please remove the paper ties or string and permanently secure the muzzle with the included cable ties.
  6.  After finding the best fit for your horse, simply trim the excess fin material just above the top hole being used.  It is fine to wait a day or two to ensure your muzzle is a comfortable distance from your horse’s mouth before trimming. The “keeper” on the cable tie is on the outside of the muzzle and the excess is facing down and trimmed close.

If you have fitted the muzzle properly and the muzzle is the correct size it will work famously. If you find there is too much grazing room be sure your fins are snugly secured to your halter.  The fins should not move along the noseband. If it does simply pull the cable tie tighter.

Additional Fitting Tips

With the horse’s head in the upright position it is OK if the muzzle lightly touches the lips. Horses spend most of their time with heads at ground level. Lower their head to check there is about a half inch of clearance when the horse is in grazing position.

If your horse is attempting to eat out of the sides, this generally means they are not able to get grass through the center hole.  The size of the center grazing hole needs to work with other variables such as the height and thickness of the grazing grass.  We provide the smallest of grazing holes with the ability to enlarge it.  Just look to see if you might need to enlarge the hole.

If the problem persists, check the horse’s fit while in the grazing position.

a) Lower your halter and make sure your muzzle is not on the top hole, the more “leggy” the fins are the easier it is for them to try to eat out of the sides.  Raise the entire muzzle up several holes.  If this does not work you might need a smaller muzzle.

b) Make sure the fins between the front (or back) fin and the side (attached to the square ring) are evenly spaced.  If you have the fins neighboring the center front or center rear too close to the center one the horse will be able to eat out of the sides rather than the grazing hole.

The closer you fit the muzzle to your horses’ lips the less likely it is they will step on the muzzle and tear it.

Care Instructions

  • First, you can place the grazing muzzle in a net washing bag and wash on cold water with detergent and a teaspoon of bleach.
  • Second, more extended clean, stick it in a bucket with dish soap and a cap full of bleach.

Package Includes:

  1. Grazing Muzzle
  2. Instructions
  3. Twist ties for initial setup
  4. 12 permanent ties – 55# tensile strength
  5. Reusable packaging

Used Materials

The grazing muzzle is made from one of the most durable polymers on the planet.  It is fungal, mould and UV resistant.  It is safe, effective and durable.  There are no “off-gassing”  materials so they are safe near the nostrils.  Even if accidentally ingested the polymers pass USA food safety regulations.  The muzzle is ideal for slowing down speedy eaters, limiting grazing, and can help curb minor cribbing problems. The muzzle can also keep horses from chewing on leg wraps, wood, or blankets. It works extremely well with all automatic waterers and has UV protection which works much like sunscreen for those delicate noses.

Returns and Warranty Information 

90 day limited warranty - One time replacement


· ThinLine zip ties must be used.

·  A break away halter must be used. 

· Photos and proof of purchase required. 

· Any modifications or issues caused by normal wear and tear will void warranty. 


Please note: Your horse's safety is paramount. There are safety breakpoints in place to prevent the risk of injury to your horse while wearing the grazing muzzle and breakaway halter. 


Normal wear and tear included but not limited to: 

· Discoloration, teeth marks/grazing hole wear caused by exuberant grazers or pasture mates.

· Damage caused by a safety feature working resulting in a torn fin. 


30 day satisfaction guarantee:  

Should you decide not to keep your grazing muzzle, you are responsible for all return shipping costs, but 100% of your purchase price will be refunded with proof of purchase.  Please be sure to clean products to the best of your ability and make sure items are completely dry before packaging for return. Any modifications made to muzzles will void this guarantee.

Click here to purchase additional cable ties

Click here to purchase Breakaway Halter

Click here to purchase Padded Liners



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Pair it with ThinLine Flexible Field Safe Headcollar

The ThinLine Flexible Breakaway Halter is designed for a very comfortable and secure fit in combination with our muzzle.

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ThinLine Padded Halter Liners / Bridle Wraps, 3 Piece Set
ThinLine Endurance Dropped Rigging Saddle Pad
ThinLine Contour Basic Half Pad
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