LITTLE ROCK, Ark. - Wal-Mart Stores Inc. quietly stopped selling two brands of dog treats in July, after customers voiced concerns that the Chinese products may have caused their pets to fall ill, but no recall has been announced, a company spokeswoman confirmed.

The world's largest retailer started pulling Chicken Jerky Strips from Import-Pingyang Pet Product Co. and Chicken Jerky from Shanghai Bestro Trading on July 26, spokeswoman Deisha Galberth said late Monday.