Ключевые слова: action, alert dog, animal, animal behavior, backyard play, biting stick, brown dog, canine, chewing, closeup, daylight, dog, dog park, energy, field, fun, fur, german shepherd, grassy field, green grass, healthy pet, joyful pet, loyal, muscle, nature, nature scene, nature walk, obedience, outdoor, pet, pet moment, play, playful, powerful dog, protection dog, rural, shepherd breed, stick, stick chewing, summer light, teeth, tongue, training, working breed, working dog,