two 4 week old puppies compete for and play with a brightly colored squeaky ball while lying on the grass yard

two puppies pup healthy growing one month old active mixed breed young canine cute adorable littermates siblings interact together play activity agile lively happiness playfulness fun hyperactive hyper energetic energy vigor mischievousness mischief rascal waggishness outside outdoor lawn park grass garden backyard behavior teething personality bite gnaw teeth chew weeks compete squeaky ball toy week brightly colored lying yard