If you happen to have bought donkey meat at a Chinese Walmart recently, listen up: you should probably return it for a refund, because it most likely contains meat from other animals, Reuters is reporting.

This might all sound rather odd, but donkey meat is apparently a popular food in some parts of China, where 2.4 million of them were slaughtered in 2011. The Shandong Food and Drug Administration claims that there were traces of fox meat along with the donkey, which was sold with a "five spice" flavoring.

Walmart has been looking to expand in a major way in the country, with plans to open 110 new outposts there within the next few years. The company plans on investigating, tightening their food safety standards, and taking legal action against the supplier.

"We are deeply sorry for this whole affair," Walmart's China president and CEO, Greg Foran, told Reuters. "It is a deep lesson (for us) that we need to continue to increase investment in supplier management."