Ключевые слова: actions, activity, agility, animals, behavior, border, canine, catching, collie, color, competition, concepts, cruel, determination, disc, dogs, domestic, effort, excitement, exercise, fitness, flying, fun, fur, high, horizontal, ideas, image, joy, jumping, midair, nature, outdoors, park, pets, plastic, play, playful, playing, purebred, red, retrieving, skill, sky, speed, sports, summer, toy, tricks, up,