Devil Dogs are small cookie sandwiches that act as police dogs, and work alongside Wynchel and Duncan.
They resemble hot dogs, but with devil's food cakes instead of buns and a white creamy filling instead of a sausage. King Candy and his henchmen Wynchel and Duncan set the dogs out to search for Ralph when he escapes from his castle. They seem to be eager to please Wynchel and Duncan, running after Ralph at full speed after making his escape.
Real Devil Dogs
They are the same as Drake's Devil Dogs, a classic snack cake made originally by the baking company Drake's, and then later by Hostess.
Ironically, Hostess ceased operations in November 2012, shortly after the release of the Wreck-It Ralph film. This means that Devil Dogs are no longer being made. However, it is possible that the rights to manufacture them (along with Twinkies, Ding-Dongs, Ho-Hos, Zebra Cakes, etc.) could be purchased by another company in the future. They have made a triumphant return.