Sources are saying U.S. pet care chain Petco has launched a creative-agency review. Former AOR Draftfcb in Irvine, Calif., now handles Petco on a project-by-project basis. Word has it the 1,100-store U.S. chain has contacted some creative shops in recent weeks. Media spending on the brand exceeded $28 million last year, up slightly from about $26 million in 2011, according to Nielsen.