Does your dog love to play fetch with tennis balls? Maybe he likes to just chew on them. Many dogs do, however, I have some important information for you.
Last Tuesday I took a Golden Retriever I look after, who loves to play fetch with tennis balls, to the veterinarian to have his teeth cleaned. All went very well . When I went to pick him up, I got instructions from the Vet Tech regarding his post-op care. She also told me that his teeth were quite worn down. He is almost 8 years old so that was not terribly surprising, but she said the biggest culprit in wearing his teeth was tennis balls. Apparently the material they are made from is very abrasive and almost works like steel wool in abrading the surface of the teeth. She recommended we switch to rubber balls. And that is what we are doing.
If your dog loves to play with tennis ball. I suggest you look at changing to a rubber ball. The dog will have just as much fun fetching these balls and they will not hurt his teeth.