missyclare
Posted : 11/23/2010 3:34:49 AM
Sounds like Paul has become his own good farrier. Congratulations, Paul. The way you've learned is the best way, with hoof in hand and guidance along the way.
With a strong hoof on hard ground, I would be loathe to touch the frog for any reason, other than the odd flap. That's very important callous that's needed for that ground. I have learned to become ambidextrous and am able to change the position of the rasp to avoid the frog.
As for the bars, yes, they do many different things, depending on what the current stress/torque and pathology is. They can squiggle like worms, look like logs, invade the quarter, get buried in false sole, get buried in the hoof and grow complete necklaces around the frog. They smash into the frog and create bar bridges under the frog itself. They can also fracture. They smash into the groove and sit there looking pounded in....all sorts of things. The bars should merge with the sole 1/2 way back on the frog and ramp straight up to meet the heel platforms dead on, with surface flat to ground. This ramp should not be higher than the heel platforms or surrounding walls. To me, this is a bar that doesn't jam up and is ALL support at the back of the foot.
I used to think less is best, but not so much any more. We do not have mustangs that travel umpteen miles a day. In reality, these are domestic horses that need changes in diet and horsekeeping and are faced with an incredible amount of pathology in these early barefoot trimming years. When I see a properly trimmed healthy foot, its a breath of fresh air. Our horses need help to get over the hump. I want a coaxed, forward-moving transition and do not condone needless discomfort along the way.
What I started to see with overgrown bars is the lameness from it, hoof contortion and a serious jam into the corium. Its an awful stress that's worse than flare torque at the toe.
I just instructed an owner via xrays and pics that showed a hoof that was "almost there" but had suddenly gone lame. Beautiful trim...the only problem was the bars. This hoof had excellent concavity, yet the sole was thin at the apex. The bars were splatted all over the sole and only the toe was actual sole...the rest was layers of bar. The hoof from the side view showed a jammed up coronary band from back to front. The toe wall profile was slightly convex. The bar material over the sole had thinned it underneath...flattened down the growth tubules of the sole and smashed them into a no growth situation. This sole had not built thicker with transition despite the concavity. I certainly did not instruct her to ream the hoof out. This has to be done gradually, slowly taking the jam out of the bars, but still leaving some as a bandaid until the sole recovers.
This is the worst crime committed by bars. I'll try to explain what was happening. The bars were higher than the heels. The forward roll of the hoof had to get up over the bars after the heels landed. Like the hoof having to get over 2 breakovers in one step. The horse lands harder and lower on his heels to avoid and pushes the heel platforms forward...in turn splatting the toe forward and lengthening breakover. The white line/P3 connection is being pulled back off the wall. The back of the hoof becomes sunken and the heels lose their support. The tension to both the DDFT and the Extensor tendon is awful. Soon, the horse is walking on the back of his heel platforms...until the whole heel breaks out...then you're in trouble. What you have going on is a negative palmer angle. But the real crime is upwards, vs. forward. When that hoof tries to get over that highest jamming part of the bar (pinch point) it jams right up into the corium. Like the arched coronary band above it, the hoof is landing and pushing the heels forward, a big jam to the middle of the hoof and leaves the toe hanging. The whole hoof is trying to fold itself in half from heel to toe and starting to look like it belongs on a Geisha girl. The groove will be really deep at the back and then 1/2 way forward, suddenly vault to shallow and stay there to the apex.
If you look at the outside of the groove and follow the bar wall from the groove to the top, you'll get an idea of just how tall a wall it is. The jam goes right down the wall into the corium. That bar wall also retains sole at the heels and seat of the corn. As long as you're trying to obey sole, that wall will never let the sole exfoliate and allow you to bring the heels down.
I have uncovered embedded twigs, stones and old bruises in the process of shaving down bars. To me, that's a bar screaming for relief.
When that jam up into the middle of the foot is relieved by lowering the bars, the heels are released to come back, coronary band straightens and relaxes. Underneath the hoof its spitting the height of that bar wall out, so they pop back up again, or look longer again. I've trimmed many a bar, walked the horse 5 minutes and gone back and trimmed the bars again just to get back to where I was the first time, then a few days later, again. Once they are formed, where they belong and happy, you usually don't need to touch them again, but its one nasty/painful hump that the horse needs help with. Make sense?
Sorry for the length of this. I felt challenged for an explanation and felt the need to give it.