A working breed, the Koolie originated in Australia. The breed can have any coat type other than wire-haired, and can be any colour other than brindle. An intelligent breed, the Koolie excels in varied roles, such as in working situations, sporting activities, loyal service or companionship. Not naturally aggressive, the breed is known to be patient, temperate, dedicated, and show a strong sense of willingness and devotion. With an average lifespan of 18 years, the Koolie does not have any known health problems currently known. This may be due to the lack of health testing in the breed.