The Labs crack me up. We buy tons of tennis balls every month. They get chewed, lost, buried and some sink to the bottom of the pool.
We noticed that even though we throw a ball for each Lab, there is only one ball in play. It has to be the last ball that one of them had in their mouths..no other ball will do. They are avoided.
The painting was from a photo I took of our Sammy this morning as he was looking for the "Ball in Play! " The one that is seen was not the correct ball.