(This is all just background info)
My friends have this barrel mare and she was diagnosed with navicular syndrome around the age of 15(she is now 28) There was a slight rotation to the coffin bone when they first found out but they never re-did Xrays to see if it changed at all or if they were keeping it maintained. They just kept her in padded wedge shoes while she ran barrels.
This mare pounds HARD with both front feet, always has. And out of the blue this past May her owner decided she didn't need the wedges anymore and took them off to put barrel shoes on. Well as I said this mare pounds really hard so naturally I felt this was a bit risky but it's not my horse.
So about a month ago they pulled her shoes. A few weeks later they find the mare down and she doesn't want to get up and when they get her up she doesn't want to walk at all. They have the farrier come out and he looks at her foot and both front feet are one big bruise. The whole sole is a purply(sp?) bruise. When he tried to shave off a bit of the overgrown hoof(she was due for a trim) it bled and he BARELY shaved any off and around the entire edge of the hoof it bled and she nearly yanked her feet out of his hands.
What would cause this? If navicular gets bad enough will it cause the hoof to bleed? Could this mean that the coffin bone rotated more and could possibly be coming through the hoof sole?
Sorry I don't know much about navicular other than what I've read in vet books or online and I don't even know if it can cause the coffin bone to come through. I just figured because the navicular bone helps with the flexor tendon wouldn't the degeneration of the navicular bone cause the tendon to pull on the coffin bone? If I'm wrong in thinking this let me know please.
Also please no saying bad things about these people for changing shoes and whatnot I didn't post to bash them as they are my friends, I just posted for my own knowledge as I was wondering what would cause the hoof to bleed and be purple.