Well, no, not necessarily a breed thing..as Paints are shown for the same movement... although it could make it APPEAR to be a breed thing or even a bloodline thing, when that particular line is bred for that discipline...
My thoughts are if a horse bred or trained for the flat knee way of going, it is not fully extending it's legs and feet out as the horses' body and conformation and genetic make up was made to so...therefore not getting that heel first landing...
a toe first landing causes navicular disease... fact.
I found a better example... I even think this horse is landing toe first on the inds... Which is hard for a horse to do...
https://www.youtube.com/watch?v=Py_ic_ibuTshttps://www.youtube.com/watch?v=Fo0XcPMK0JYThis hrse is learning to go western pleasure (So maybe not bred for it perhaps?)... and is clearly landing toe first...
IMO, it is very hard for them
to land heel first when asked for this way of going...
Could this be why so many seem to be navicular syndrome/disease cases... ?
Just something I was pondering..
I see tons of beautiful photos of these horses...only to see them in wedge pads or heart bar shoes... Even on the hinds!