Karruim Demaio, a former employee at McDonald's, posted a video of a mouse running loose in a bag of Big Mac buns used to prepare burgers.
He told Fox that he had witnessed this happen many times at the Philadelphia branch, where he worked for a year. He claims it was the sixth or seventh time that a rodent was found alive in a bag of buns.
"I was working there from October of 2010 to January of this year. There hasn't been a time when we couldn't go in the back and see mouse droppings on the bread," he adds.
Ken Youngblood, the owner of the franchise, was contacted by the news outlet and responded that he would launch an investigation into the matter.