Sometimes, if you are a dog, you are the dog with the ball. Usually, however, you are not. When there are two dogs and one ball, only one dog can have the ball. And there is nothing you can do to change that.
According to this video's description on YouTube, the dog with the ball in this case is Millie. Goggles, the other dog, wants the ball. Tough shit, Goggles. Millie doesn't owe you anything.