PETCO is a large specialty retailer of pet products and services with over 1000 store locations across the US. Their two main energy uses are lighting and HVAC. To reduce costs and environmental impact, PETCO implemented an energy efficiency strategy including energy management systems, efficient lighting upgrades, sustainable building practices, and behavioral changes. These efforts decreased total energy usage from 2007-2009 despite adding over 100 new stores. PETCO's next steps include incremental efficiency improvements, new technologies, goal setting for long-term sustainability, internal awareness campaigns, and demand response testing.