Ridiculous. You'd have to wear off the coffin bone for this to
happen and by then your horse would not be standing up. Some people will say
anything.
"The navicular bone is located directly behind the
coffin bone, between the short pastern and coffin bone held there by tendons
and ligaments. The navicular bone has two main functions:
1. To protect the joint and tendons from pressure and
concussion. The deep digital flexor tendon connects at the coffin bone, runs
under the navicular bone and up the back of the horse's leg. The navicular
bone acts as a pulley on the deep digital flexor tendon, which
takes stress off the coffin bone by absorbing a majority of it.
2. To act as a valve for blood flow to the coffin bone and corium in
the hoof. With each foot-fall in a properly maintained hoof, the navicular
bone helps to turn-on and shut-off blood flow into the coffin bone and
corium. With poor hoof care (specifically high heels, overlaid bar,
long toes), the navicular bone becomes immobile which results in poor blood
flow within the hoof. The navicular bone plays a large role in the overall
health of the hoof, and of the whole horse. "
Just for the record, I use Mustads. If you are worried, they have a metal
core.
