If you contact your local feed store, someplace that supplies feed for cattle and the like, they can usually get the big bags of rodent block for cheap.
I include lower protein dog food in my food mix for Mice and ASFs. I don't have any problems with oily coats or hot spots because of the lower protein content. Basically the cheaper the dog food the lower the protein content, and the more they will like to eat it.
I also provide wheels for all of my colony tubs. I don't have problems with fighting, chewing, or food shredding. It helps keep them busy so they don't get bored and shred all of your paid for food.
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Lincoln, NE
0.1 Pastel, 1.0 Pastel het Pied, 0.1 Pied, 0.1 Cinn, 1.0 Black Pewter, 1.0 Woma (hidden gene?), 0.1 Yellowbelly
2.1 Normals, 1.0 Thayeri, 0.1 Thayeri X Alterna, 0.1 Whitesided P. catenifer sayi, 0.1 crazy cat, 1.0 husband