No, Jack in the Box does not serve kangaroo meat. Back in the early 1980's, some meat tested at the Jack in the Box receiving center contained kangaroo meat. Jack in the Box claimed that none of this meat made it to their restaurants but the publicity was enough to dampen sales. In response Jack in the Box changed their name to 'Monterey Jacks' as a more upscale (expensive) fast-food restaurant featuring 100% pure beef burgers that were 'seared and seasoned'. Ray Charles did a series of TV and radio commercials promoting the brand. After a few years the Jack in the box name was reinstated along with the addition of the ball-headed mascot 'Jack' that is still used for their ads to this day.