I have been doctoring a foundered horse for almost six months. She was brought over to me to keep my gelding company because of the death of my mare. I could actually see the bone on the bottom of her foot. I have babied her, she is in a sandy pasture and yes, be very careful how much you feed her. My farrier came out did his thing and told me he thought she was rideable. I took her out on Sat. and she did very well. I live in the country so we only have dirt roads. It was suggested at one time to the owner to put her down. The most important thing is not to feed them to much. You might want to ask your vet for a prescription to alleviate some of the pain. Good luck and I hope she/he recovers quickly.