Join Date: Oct 2009
Location: Just south of sanity
His teeth are either nonexistent, or he needs a good floating. Call your vet and have them look in his mouth.
When a horse quids hay, their teeth are either far too long and hooked, or they're few and far between.
If you find that he has very few teeth left, buy him chopped hay. He won't be able to get anything out of regular baled hay any longer.
Along with the chopped hay, buy him some beet pulp pellets or shreds. You'll have to soak them and make a mash for him. Beet pulp is pretty much magic when it comes to putting weight back on.
Also, while the vet's out, have them do a fecal. The pony is probably also full of worms.