This is Maymo, and Maymo just had the Greatest Day of His Life. For his birthday, Maymo was given 100 tennis balls.
I must say, I'm skeptical. Is 100 balls appreciably better, excitement-wise, than 5? Than 10? I'm not so sure. And I don't know if Riley will ever be excited by just one ball after the Greatest Day of His Life.
Despite all of this, watching a dog get showered with 100 balls, something he could never have expected even in his wildest dreams, is pretty awesome.
h/t to Gawker