BoneKare Supplement - Has anyone used?

I was recommended to look into a product for my horse called BoneKare.
https://bonekareusa.com/buy-horse-bone-supplement/

Has anyone ever used this? What were your results? My horse has some boney changes along his back and she wants me to put him on a bone supplement.

She recommended that I am looking for the active ingredient in vitamins K1 and K2 - Quinaquanone.

Another company that makes it (but apparently has trouble shipping to the US is Vitamite…

Is this even something worth looking into? It is really expensive and I don’t want to waste any more money.

Thanks!