Deer in Texas are all the time getting hit. The guys who have the bolt on Brush Gurards/Buddy Bumpers never fair well. And this is with small Texas deer. Those Brush Guards always get pushed into the hood, grill, headlights, and at times fenders. Not to mention at times the factory bumper get slightly damaged too. There would have been less damage if they had left that bolt on brush guard off.
Now, I have had a large steel Baja style bumper since around 2009-2010. I was driving home, when another truck going the opposite direction, made a fast left turn in front of me. I was going around 45mph when I t-boned his truck. It hit so hard that the roof of his truck buckled. All it did to mine was bend the frame, where the bumper attached around 2 inches over, and slightly pushed the bumper into the grill and one fender. It was an easy repair on mine. The other truck was totaled.
So, what I am trying to say is to get a solid steel bumper, with a welded on grill/guard.
Oh, also make sure the bumper/grill guard doesn't fit to close to any of the body/grill/etc.