Ok, so my 20 year old horse foundered this year and I can't seem to win. I have had him off pasture for a good 4 weeks, and he is doing amazing. Thought he didn't founder bad I am worried. I have been giving him grass hay and he has lost a lot of weight. when I put him back to pasture though, he eventually gets lame again after about a week of only being out for at most an hour a day if that!! Not sure if there is anything else going on, and if anyone has expereinced this. Also, the spring grass is gone no? And can I put him on grain to get weight before winter? Its right around the corner! Any thoughts please let me know!