Quick Answer:  If your horse won't eat with a grazing muzzle and he is getting fat, this is a big problem.  You will have tried lots of different muzzles I suppose, like I did, but nothing suits your horse.  You worry and don't know what to do next.  Perhaps a new unique horse grazing muzzle will be the answer - it was for me and my Skye - check out the LiteBite Horse Muzzle.

The problem with grazing muzzles for horses is that the usual small round hole to eat through is difficult to manage for them.  Some horses can eat that way but many cannot.

The LiteBite horse muzzle is new and different.  I thought that as a horse takes a full natural bite, the small round holes are completely the wrong shape for them.  If there was a grazing hole that matched the way a horse bites, then they would be much more willing to try.

This proved to be the case for Skye, she got the idea almost immediately and she was fully grazing with it in minutes.  The narrow slot means that she doesn't get too much with each bite, she drank straight away and the water just poured out of it and does not go soggy.

Worth a look if your horse won't eat with those other grazing muzzles.