My horse ever since April has been consistently off on his right front (whenever I ride him). There is definitely a drop that occurs in his right shoulder when he is being ridden; however, the vet said that he is not off enough to fix the problem since he cannot tell where the lameness is coming from. We had the impression that it may be a saddle issue so we have tried various saddles with no real difference. It has been very frustrating. Is it possibly just that he needs injections or could it be something like the start of navicular? What do you all think? Any advice is GREATLY appreciated! Thanks!