Border Collies are often called the world’s smartest dog breed for a reason. They are loyal, brilliant, and full of energy. For dog moms who want an intelligent partner in daily life, Border Collies can be an incredible companion. Just be ready to keep both their body and brain busy.

Chihuahuas are famous for their small stature, usually weighing between 2 to 6 pounds. Despite their size, they have a bold and confident nature.