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