Toughest place i have hunted is down in the catcus country I hate it. Don't have a problem catching hogs in it I just hate it.
X100
I have seen a good number of "jam up" hog dogs and even more Hog Doggers come back to the truck with their tails between there legs cover up in cactus thorns. In my opinion it takes a pretty hard dog with some brains to stick with a runner it some of the big cactus country around here. Especially with the weeds being head high and can't see 3 feet in front of you.