Kangaroo Meat In Jack in the Box's Hamburger

Jack in the Box uses kangaroo meat in its hamburgers and other meat products.They use it because it is much cheaper and the customers can't tell the difference.

In 1981, horse meat and kangaroo meat was labeled as beef chuck at a Foodmaker processing plant that among other companies, provided hamburger meat and taco meat to Jack in the Box restaurants. The meat labeling mistake came from the Australian meat distribution company called ProFreeze.

The kangaroo meat never actually made it to the burgers or tacos of Jack in the Box customers, but the story some how got into the news, and the rumors started spreading.
The rumors were most likely aggravated by Jack in the Box’s tragic E. Coli outbreak in 1993. Jack in the box locations in Seattle and coastal California served undercooked patties with fecal matter containing E. Coli. 600 reported sickness from the bad hamburger patties and four children died of hemolytic uremic syndrome.
http://www.examiner.com/article/jack-the-box-kangaroo-meat-legend-half-true