ThinLine Flexible Filly Slow Feed Grazing Muzzle, 2.5 cm Opening

  • $68.00


  • 2-1/2 cm opening 
  • The Flexible Filly Slow Feed Grazing Muzzle is unlike the typical heavy, hard and "cage-like" grazing muzzle apparatus. 
  • ThinLine has rethought the design of this grazing muzzle to be softer, lighter and less confining. 
  • The Flexible Filly is constructed of a pliable, exceedingly durable fungal/mold/UV resistant polymer that reduces the chances of the muzzle getting snagged and is soft on the equine teeth and lips. 
  • This muzzle is ideal for slowing down speedy eaters, limiting grazing, and can help curb minor cribbing problems.
  • The Flexible Filly can also be used to keep horses from chewing on leg wraps, wood or blankers and works extremely well with all automatic waterers.
  • The Flexible Filly is well-ventilated and safe (being rated to break just before your leather turnout halter), and has UV protection which works much like sunscreen for those delicate noses.
  • There is so much flexibility in this grazing muzzle, that it will fit a variety of horses. 
  1. My Horse sized halter fits when at the middle hole or above, order the 24?.
  2. My Horse size halter fits at the bottom hole or two, order the 25?
  3. If you are on the fence, always order DOWN to the smaller size.
  • Draft or Oversize: Order the 25";  large.
  • **Mini Muzzle sizes are in BETA testing- these will be the small size.**
  • Restricted 2.5 cm opening. 


For the ultimate in equine comfort, the ThinLine Grazing Muzzle Halter and ThinLine Halter Liner Padding are sold separately.


Applying your new muzzle:
  • 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.
  • 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.Once you are satisfied you have the correct holes aligned to the halter please remove the paper ties or string.
  • 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 nose band, one in the center, the other two fall naturally to the sides of center.  Three fins will connect to the chin band; one in the center, two naturally to the sides of the center.
  • 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.  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 prior to trimming
  • >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.The “keeper” on the cable tie are 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 nose band. If it does simply pull the cable tie tighter.