dog food will work,just don't buy any with food dyes.recently i started using kent feed rodent food and it seems to work well,and it's cheaper than dog food,only $9.99 for 50 lbs.

if you go to kentfeed.com it has a dealer locator,i'm sure there's one near you,also tractor supply store can order it.

23% protein and formulated for rodents plus cheaper than dog food,best deal i could find.have fun !