american, ball, playing, puppy, pet, dog, true-bred, puppy-dog, sweet, nice, young, pedigree-dog, soft, cuddly, action, fast, green, outdoor, Collie, canine, self-denial, age group, city, collie, district, domestic animal, outside, animal, indo-european, urban area, american english, pup, west germanic, germanic, young mammal, cuddlesome, shepherd dog, youth, english, mammal