These balls end up in odd spots. She seems to delight in trying to get them out of them. We've caught her deliberately dropping them from the edge of the stairs so they will fall behind her kennel. She has figured out how to paw at them through the bars to get them to pop back out again. However, if a ball ever does get stuck beyond her ability to get, she then whines until someone gets it for her--even if another ball is right next to her.
Her favorite activity is for someone to throw for her. The best is when outside, but she also likes it when the ball is throw up or down the stairs. She particularly likes bank shots as well as high tosses that give her a chance of catching the ball--either on the initial throw or on a bounce.
She has become a bit demanding about playing, often dropping the ball on our feet or in our laps over and over again until we throw it. Unfortunately, she really enjoys chewing the balls until they are covered in slobber before she drops them. Playing fetch with her often ends with slimy hands.
Still slimy hands are a small price for giving her such joy.