The Australian cattle dog is known by several names. These dogs are often called "heelers" because they nip at the heels of cattle. Learn more about these dogs in Australian Cattle Dogs, part of the All About Dogs series. Each title in this series introduces the history and features of one of the world's most popular dog breeds. Young readers will love the stunning visuals and fun facts in All About Dogs. All About Dogs is a series of AV2 media enhanced...