Finding the ball way up high.....not easy

Meet Mijne:-) He's the tallest of the bunch. And he is the most eager to find the balls I sometimes hide in the trees. Since a couple of weeks I don't only throw or hide the balls on the ground, but I also hide them in trees.
For Jessie, Jane and sometimes also Mojo that means that they have to jump high and with there nose they 'bump out the ball' and catch it in their mouth.
However, Mijne is so tall that he stands up both his hind legs and grabs the ball with his mouth out of the tree.
In the picture he smells the ball, only he is 'barking up the wrong tree' LOL. Jane can only watch in adoration.