I found the small tree frogs or leopord frogs work well with smaller snakes. Just make sure the snake can catch the frogs. Others will tell you to switch him over to pinkies. Here is a link that list several different ways to convince him to eat pinkies.
http://forum.kingsnake.com/hognose/messages/5710.html
You probably need to get him to a vet to check for parasites. Quite common in WC Hoggies.
Here are a couple of links to care sites. The basic care is relatively the same for the different N. American Hogs.
http://www.reptileallsorts.com/westhognose-cs.htm
http://www.lihs.org/files/caresheets/sheet19.htm
Those are just a few of the sites I came across in my own search for info. Hope they help. Lots of luck!!

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Jenea
1:3 Eastern Hognose
0:0:1 Florida Redbelly Snake
0:1 Gulf Coast Box Turtle
1:1 Red-eared Slider
2:0 Cats
1:1 Kids
1:0 Spouse