My Shire horse has a strange lameness that just seemed to appear over the last weekend. he is not worked at present so i know its not that. his left front leg is causing him some grief, he is not favouring the leg when stood still, and weight bears evenly when stood still, but when he moves, there are signs of lameness and more so in trot, but canter seems to be ok. he is happy to run about quite the thing in the field but once he has, he starts to show lameness again. i have inspected his leg and can see no signs of heat or inflamation, i am hosing it with cold water twice daily. the farrier is due in a couple of days so he will rule out foot issues (which i suspect it isnt a foot issue anyway) has anyone got any ideas??? he's not in agony, just a bit iffy sometimes, almost like if i were to twist my ankle, it would be sore but not agonising. we are both losing our marbles with this!!!