I changed farriers several months ago. The very first time I rode my gelding after switching farriers, he was pretty lame on any hard ground he had to walk on. I thought maybe he was just a little sore from being trimmed, but his soreness has stayed consistant over the past several months, regardless of when his last trim was. He isn't more lame on any particular leg... He seems to be hurting the same amount on each leg.
Over these several months, he has been perfectly sound on soft ground at every gait. But as soon as he steps on hard ground, he starts limping.
Does anyone have a guess as to what this may be? I'm at a loss here.