Cocoa Mulch is manufactured by Hershey's, and they claim that "It is true that studies have shown that 50% of the dogs that eat Cocoa Mulch can suffer physical harm to a variety of degrees (depending on each individual dog). However, 98% of all dogs won't eat it."
*Snopes site gives the following information:http://www.snopes.com/critters/crusader/cocoamulch.asp *