She only loves to play fetch with tennis balls when she wants to. (101dogbreeds.com)
If you want a couch potato that will chase a few tennis balls on a nice day, this is not the dog for you. (fcrsa.org)
Some vets suggest that you don't throw tennis balls for your dog because the soft, fuzzy stuff on the outside can wear down the enamel on your dog's teeth. (easyretrievertraining.com)