Did you know that there are three main kinds of guard dogs? Security guard dogs work for businesses. Livestock guard dogs work on farms. Personal guard dogs work for families. Learn more about the work these dogs do in Guard Dogs, a title in the Dogs with Jobs series. Each Dogs with Jobs title features easy-to-read text, stunning visuals, and a challenging educational activity. Dogs with Jobs is a series of AV2 media enhanced books. A unique book code printed on page 2 unlocks multimedia content. These books come alive with video, audio, weblinks, slideshows, activities, hands-on experiments, and much more.