Do you play fetch with your Lab?
Of course, you do.
Here is a set of squeaky Kong tennis balls to keep you going, they last longer than the cheaper ones.
They are covered in a nonabrasive material, unlike real tennis balls which can harm your dog’s teeth.
Tired of losing balls, then play fetch with apples, your Labrador will eat them when she tires of the game and if you lose them they won’t harm the environment.