I have a pony on Founderguard. Mickeys laminitis was thought to have been caused by concussion due to removing his shoes this winter becuase once his sympoms had disappeared he was turned out on grass and was fine. Once the spring grass came through however, his digital pulse returned.
The vet applied for a licence for Founderguard and three weeks later he started the course.
I would point out that it has only really been proven on grain induced Laminitis but my vet says that he doesn't know of any horses on Foundergaurd that have suffered another attack. Obviously you still have to manage your feed and grass intake carefully, this goes without saying.
Mickey, touch wood, has been fine ever since. I don't know if this is due to the Founderguard but i definatly would not take him off it, just in case.
I also bought a Greenguard grazing muzzle for him. He can be turned out for 8 hours a day with this due to him only being able to eat 1/3rd of his normal intake. Without it he could only be turned out for a maximum of 2 hours before his digital pulse increased. This muzzle is great and i would recommend it to anybody. It took him about three days to get used to it and i thought ( and so did he i think) that he would never be able to eat with it, but he can and now he doesn't even realise he's wearing it. If you do buy one, stick with it.. it is more than worth it weight in gold. Mickey now has a normal life whereas without it he could only go out with his friends for 2 hours. It is more expensive, but so much better than the bucket muzzles and very humane. I definitely would not be without one.
Laminitis definatly is something that can be managed very easily once you know how and your pony can have a very normal and happy life. I know.