Does anyone here have any experience with horses "knuckling over" while walking/trotting/etc? Where they step (with weight) and then their ankle takes an extra movement equivalent to "cracking your wrist" kind of like its popping? The vet described it as "knuckling over" or "knuckling down" so hopefully that rings a bell.
On Saturday Jackson pulled a shoe and then stepped on it, getting the nail stuck in his hind left hoof. Missed the frog and hopefully other critical structures (but we don't know, was pulled out before x-rays could be taken). He's been sore sore sore with soaking and so I had the vet come out yesterday to take a look. She graded him 4 out of 5 lameness on that foot and was worried that it could go either way - good with treatment or bad with infection and possibly needing more invasive care.
He got antibiotic injections and a tetnis booster and ichthammol medication to be applied and wrapped in the foot. I went out to the barn this morning to give him his antibiotics and he was VERY swollen and painful and looked much worse than yesterday. Also, the "knuckling down" started which I had never ever seen before.
Had the vet come back out (ouch, my poor wallet) because I felt panicked being at work and he called and said that he looked OK and we should continue the treatment. The knuckling wasn't good but hopefully it will go away. If it doesn't we'll need to take x-rays.
So my question to you wise horse people is have you had any experience with knuckling down and how likely is it it will just go away? Can that sort of weird extra movement happen if they are just hurting and sore or is there some additional underlying issue at foot?