Ключевые слова: action, activity, agility, animal, behavior, border, canine, catching, cheerful, collie, competition, disc, dog, domestic, effort, energy, enjoyment, excitement, fast, field, flying, free, frisbee, fun, fur, game, grass, happy, high, humor, joy, jump, jumping, motion, nature, outdoors, park, pet, plastic, playful, playing, retrieving, running, skill, sky, speed, sport, toy, tricks, young,