i rescued this pony 4 days ago. he is around 20 years old, severely underweight, had lice all over his body, still has winter hair and seems anemic. i have wormed him, given him his shots, treated him for the lice and i brush him at least once a day. i've also been giving him ad lib alfalfa pellets and bringing him out to graze for a couple hours a day. he is out in a pasture with very short grass so he keeps busy during the day. i just need help/advice on what to do to get him better. he just seems so sad. here are pictures of him and then a comparison picture next to my pintaloosa teaser pony.