Quick Answer: The top selling horse muzzles for weight control in the UK are:
- Flexible Filly - this is popular due to it's soft flexible construction, however it does break easily and allows eating out of the sides.
- The Greenguard muzzle is a good muzzle for weight control, it is made of hard plastic and can cause tooth wear and rubs.
- The LiteBite Horse Muzzle is new and of soft, strong material, it does not rub and prevents eating out of the sides.
The three muzzles above all have different methods of grazing control. No. 1 has a small round hole for the horse to eat through, this means a forced nibble. No. 2 has several grazing holes and allows more grass through but still enough for weight control, but the hardness of it does wear on teeth and it tends to rub. No. 3 has a unique grazing slot which allows a full natural bite although due to the narrowness of the grazing slot, they don't get much.
Each one is different and you might need to try them before sticking with one. Choose one first that allows a full 30 day refund guarantee like the LiteBite.