I have a Shetland Sheepdog. He is 4 years old and he is my baby. He is spoiled rotten but a great dog. His herding instinct can be a challenge. He must be leashed when we go outside because he chases and barks at cars. But we have an area of the yard which is a safe area for him to run and get plenty of exercise. We also have a cat who he enjoys playing with and "herding."