Border collie is a medium sized dog, with well-built structure and smooth shiny mane. It is highly energetic and known for its agility and grace. Its trot is smooth and gliding filled with extreme stamina and strength. It's able to change its direction with grace. It is filled with immense energy and hardly gets tired even after long working hours. Its body is covered with short smooth hair which is wavy towards the face. It is a house of energy and would tend to turn irate when left without work. It is counted among the most intelligent. It is a loyal and loving companion. It likes to chase other animals and has a habit of staring into the eyes of other animals which leave other dogs unnerving. It is very reserved and protective towards strangers.