Blue heelers typically grow to weigh between 35 and 45 pounds and will be between 17 and 20 inches tall at the shoulder. Of course, each dog is different and their sizes may vary.
Despite their small size, blue heelers are working dogs that have a lot of energy. This is an intelligent breed that needs to be kept stimulated and properly exercised to avoid destructive behavior. A blue heeler needs to be taught early on that nipping is an unacceptable behavior, and many blue heelers have very sensitive hearing, meaning they can be easily startled by loud noises.
For a small dog, blue heeler puppies grow quickly. For proper growth, they need to be fed high fiber, high fat diets to give them the energy they need to grow.
Blue heelers are a generally healthy breed and, with proper care, they can live longer than 13 years.