Stella was skinny when we got her and I fattened her up on grass hay and pasture. During the summer my horses live on pasture alone (except for this year's drought) and nobody gets grain. It's definitely not rocket science to keep a horse thriving. These are her before and after pictures. (I know most of you have seen them posted several times already.
Stella - sweet, timid, elegant, lovely, lively, amazing
Luna - large, unattractive, naughty, adored