We had a similar issue with my DH's horse when she was a bit younger, she is 6 now.. so not that old.
We like to take breaks while riding, in the shade when we can, and we taught our horses a specific que that really can't be confused with
anything else, to let them know its ok to eat a bit of grass. Otherwise, they are not allowed to eat grass while saddled and being ridden.
I also work with a shetland who likes to put his head down to eat, and his 6 yr old rider just isn't strong enough to pull his head up when he
decides to eat. I read and then got some information online, and created an "anti-grazing" rig. It is simple and super easy to make.
It is similar to an over check... but uses what the horse already has in its mouth.
Take a long thin cotton rope, about 6-7 feet long or less depending on how big the pony/horse is, and how long their neck is.
Take one end and tie it to the TOP of the bit, near where it meets the head stall. Run one end up through the browband on one side, IF you can put
it through the loop there, near the cheek piece, the better... take the other end of the rope and run it through the other side of the horse's head and
tie that end to the top of that side of the bit, you can then take the loop that is near the saddle, and either run it through a pair of d-rings near the horn,
or under the opening and then loop around the saddle horn.
If in an english saddle you can loop the end through the d-rings at the front of the saddle and then just tie a knot or a bow Or put the stirrup leathers
over each end to hold it in place.. You may need to take the slack out by tying up each end... OR make adjustments at the end that attaches to the top
of the bit and cut off the excess.
YOU need to make sure the tension is the same on each side, AND that the horse has normal head movement and can stretch its head/neck a bit.
But not enough to put its head down...
http://www.justforponies.com/anti-grazingreinsforponies.aspx
http://www.justforponies.com/centauranti-grazingdeviceforponies.aspx
http://www.doversaddlery.com/produc...2001&zmam=1460880&zmas=1&zmac=39&zmap=X1-1243
http://www.jefferspet.com/product.a...ce=Shopzilla&crkw=Perri's+Anti-Grazing+Device
What I have described is virtually identical to these, minus the snaps.. which I hadn't thought of at the time I made the set for the shetland...
Carol