Agree with this.
My old boy could go footy if you stood him on rubber matting painted green. Yet I have a 26 yo mare who (fingers crossed) is yet to have a day being footy in her life.
As above, it depends on the horse. I found that NAF haylage balancer and, to a lesser degree, PinkPowder, made two of ours footy. The third was absolutely fine on it.