According to the AKC, Border Collies are known to be smart, energetic, and affectionate dogs that enjoy being kept busy. Their coats can be rough or smooth and come in different colors. They are medium-sized with males up to 22 inches in height and an average weight of around 45 lbs. with females slightly smaller. They are an athletic breed, and due to their intelligence can be easily trained. They are also known for their intense stare or “herding-eye” when performing their job or during agility training.