When selecting a puppy, observe traits like confidence, friendliness, and curiosity. A good puppy should interact well with people and littermates, showing interest in exploring their environment without being overly timid or aggressive. Look for physical signs of good health, such as clear eyes, a shiny coat, and a healthy weight. A balanced temperament is key—puppies that are too shy or overly bold may require more specialized training. Pay attention to how the puppy reacts to new stimuli, such as toys or unfamiliar sounds, to gauge adaptability.