I was thinking more along the lines of moving up to mouse fuzzies. My only concern is the fat content you are feeding him. Pinkies have a much higher fat content than an adult mouse. As the prey item gets a little bigger, the fat content a little lower. Hogs are prone to obesity issues, so I would be most concerned about that. I do not believe they are "adults" until the age of 2. I would really try a mouse fuzzy or hopper. I feed all of my hogs prey item the same size or just a little bigger than their girth. Never had any problems. Never heard that hogs were different than others snakes when it came to food size.
Anybody else with westerns want to jump in?
-----
Jenea
2:3:1 Tricolor Hognose (plus babies)
4:2 Eastern Hognose
1:2 Western Hognose
0:2 Southern Hognose
0:0:3 Florida Redbelly Snakes
0:1 Gulf Coast Box Turtle
1:1 Red-eared Slider
1:2 Eastern Fence Lizards
2:0 Cats
1:1 Kids
1:0 Spouse