Pet Food Express in Palo Alto is one of 34 stores in the Bay Area. The company is the largest retailer of holistic and hypo-allergenic pet food. True to its motto, this company is "dedicated to pet rescue and adoptions," so it does not sell pets in its stores. You can, however, enroll your dog in training classes or use the state-of-the-art self-service pet wash right in the store. Pet Food Express also sponsors vaccination clinics and mobile and online pet adoption services.