Wal-Mart Stores Inc. says it's considering taking legal action against "responsible parties" after DNA testing showed traces of fox meat in the donkey meat it sold in China.

Wal-Mart had recalled the donkey meat -- which it said was considered a popular delicacy in parts of China -- after DNA testing by a government agency. The company said Thursday that it withdrew all products from the supplier, Dezhou Fujude Food Co., and that affected customers were offered compensation.

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It also says it plans to add DNA testing to its meat products in China.

Wal-Mart, based in Bentonville, Ark., has 404 stores in China. A spokesman for the company, Kevin Gardner, says only a select number of stores were affected, but didn't give a specific number.

It's not the first time a U.S. company has encountered supply issues in China, where food safety is a significant concern among consumers. Yum Brands Inc., which owns KFC, is still working to repair its reputation after a Chinese TV report in 2012 that showed some of its suppliers were giving chickens unapproved levels of antibiotics.