Pet foods like human foods are continually being tested for quality and safety.  Sometimes during the course of testing they find that a food is, or has a potential to become, unsafe and it is then recalled.  Recalls occur often, more often than many of us think.  The following is a link to the FDA website which contains the most up to date information on current pet food recalls...

www.accessdata.fda.gov/scripts/newpetfoodrecalls/