I've not hunted, but I spent 11 days in Kenya in Merrill Moabs. I stepped on an acacia thorn and it went right through the Vibram sole - which really surprised me. I'd wear Moabs again.
but i also like my Courtneys... ;-)
I have a couple pairs of Vibram soled Timberland Alpine Heritage boots that have been my regulars for yard work and hunting for over a decade now, and they resisted the thorns from a sizable honey locust I tangled with (and then eventually took an axe to) over the years. Those thorns were miserable bastards that regularly punctured lawn tractor tires and also automobile tires on at least two occasions.
Super hot day, and made the soles softer perhaps? I wouldn't have thought it possible.
Apparently the acacia is not to be trifled with.