PetSmart (PETM) is on the verge of crossing over to elite status. The company grew earnings 26% in fiscal 2011, 27% in 2012, and analysts expect fiscal 2013 ending in January to show a 38% gain. Growing earnings at a 25% or faster pace for three consecutive years is one of the marks of a great stock. PetSmart hasn't done it since the 1990s. The company is the largest pet-oriented chain in the U.S. and the only one listed. Other top rivals are