hi im new so i hope this works. our 8 year old quater horse has IR.and tends to show founder syptoms. we bought in a nutirtionist after talking with our vet who changed his diet to the following( dry lot ,hay testing and grain changes,low starch). The nutrionist put him on a good timithy hay which we buy from the same supplier off the same hay fields and is tested, he is also on a timithy hay balancer cube with vit. and minerals added to ensure nutrition.We have seen a major improvment in his health