Baxter the Wonder Dog is not overly fond of playing fetch. He particularly does not like to play it outdoors. But on occasion indoors he will play for about a dozen throws before he gets fed up and wanders off. But sometimes when he gets excited about something he will fling his fetch toy by himself and then pick it up.
But I have never seen him show the kind of dedication that this clever little dog in Japan showed. He apparently does this often.