Only Natural Pet®, Wellness®, Instinct® and Castor & Pollux® Among Top Brands in Pinnacle Line PHOENIX, 2017-Nov-20 — /EPR Retail News/ — PetSmart today (Nov. 16, 2017) announced the addition of its Pinnacle Pet Nutrition Shop in all new stores*, a dedicated space featuring an expanded collection of pet food products offering high-protein, organic, natural, grain-free, minimally…