We had a silver and black poodle - his love was a green tennis ball - he played for hours with that thing - and if it became lost under a piece of furniture, he would reach under clear to his shoulders trying to get it and then would cry and make your life miserable until somebody got it for him!!
It was fun when I bought a tube of tennis balls (3) and threw them all out of the floor at once! He would go nuts trying to catch all 3 and tuck them away. Little dogs are so much fun.
Marysewfun