GeminiJumper- She has many missing teeth and her teeth are very worn down. The vet estimated her age around 30. Have you ever seen a horses teeth at that age? Even one whos had proper dental care all its life will have worn teeth. The vet came out to do a float, but with teeth that worn and missing there would be no point in grinding them further. Did you read my first post? I explained everything in there. This topic isn't about my horses weight. As I explained in my first post she was chunky/overweight when we first got her. The vet has deemed her weight to be prefect right now, and he's the one who told us a diet plan for her. Grazing is her supplement for hay. She still eats the hay, but since it takes so long to grind it down enough to swollow, she doesn't get that much.
AztecBaby- Thanks, I couldn't explain it better myself :)