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.
