Feisty, charismatic, and full of mischievous energy Terriers can be playful pets and enthusiastic companions. Named for the Latin word for the earth, terrier dogs were originally bred to hunt down vermin beneath the ground. Today, many terrier breeds pay homage to their ancestors with their love of digging and exceptional courage and persistence. With a bit of patience and proper training, terriers can become loyal and obedient pets. Training for terrier dogs can be challenging because of their stubbornness and sharp hunting instincts. Short, dynamic sessions that provide these energetic pupils with excitement and mental stimulation often work best.