I agree, but I want to clarify as well.
Well, the way you put it Rose, I agree too. So it seems I don't completely disagree with Qtrhorse after all, just the way I understood it.
Most navicular horses have toe flaring and may appear like they are at a lower angle, when the flare merely needs grown out.
Yes, shudder at the thought of the poor horses made to 'stand up' on their flares. It's unfortunately still not a rare sight. I think this is a major contributor of heels becoming 'underslung', as the leverage forces tearing at the poor walls are also acting to pull the heels forward.
All around I've gone from being told she had mild arthritis when I bought her and her limping only occasionally to her constantly limping, some days she doesn't even want to move. Vet's wanting to charge anywhere from $50-$500 to do the same procedures for a diagnosis. (I have contacted 4 different vets) All I want is my mare to not be in pain!!!!
That sounds like a similar story to my poor donkey's, and the main reason I learned about all this in the beginning. The prognosis by 'experts' was initial puzzlement & guessing, copious tests, then pronounced hopeless by all & he'd been on permanent painkillers for his 'arthritis' for a couple of years, & was in his 20s(& ended up with sole penetration!!) when I stumbled upon some people who caused me to rethink what I 'knew' & start learning about it. He spent the last decade of his life sound & happy & energetic, not a painkiller in sight.
If you posted some hoof pics, you'll get some more specific opinions for your consideration.