top view of two 4 week old puppies on the grass, with one gnawing on a rubber ball

active activity adorable agile animal backyard ball behavior bite breed brown canine carnivore cat chew cute dog exercise fool fun garden gnaw gnawing grass growing healthy hound hyper hyperactive lawn littermates little lively lying mammal mischief mixed month nose old one outdoor outside park personality pet plant play playfight playfulness pup puppies puppy rubber shenanigans siblings teeth teething terrier top two view waggishness week weeks whelp whippersnapper whiskers wildlife yard young