The Wikipedia describes the Koolie
(See attached pdf below)
A herding dog is a dog that either has been trained in herding or that is a member of a breed developed originally for herding. In general terms, they are considered a subcategory of working dogs, but for dog shows they usually form a separate group.
Some herding breeds work well with any kinds of animals; others have been bred for generations to work with specific kinds of animals and have developed physical characteristics or styles of working that enhance their ability to handle these animals. Commonly herded animals include cattle, sheep, and reindeer.
Dogs can herd other animals in a variety of ways. Some breeds, such as the Australian Cattle Dog, typically nip at the animals' heels (for this reason they are called "heelers"). Others, notably the Border Collie, get in front of the animals and use what is called "eye" to stare down the animals; they are known as "headers". The Koolie has been observed to use both these methods and to jump on the backs of their charges. Koolies are therefore said to 'head', 'heel' and 'back'. Shorter breeds, such as Welsh Corgis, were bred so that they would be out of the way when cattle, their primary intended target, kicked out at the dog.
Herding dog is also sometimes used to refer to dogs whose primary job is to guard the herd from predators and to be sure that it does not go astray. A Maremma Sheepdog is an example.
Due to their intelligence and beauty herding dogs are often chosen as family pets. It is important to remember that these dogs have been bred to work, and must be kept active. Herding breeds will herd family members, particularly children, in the absence of other charges.
This is just what we needed. Glad to see that it is out there. 