We have the small tennis balls at the shelter but I believe they are not flavored. I'll have to check next weekend.
This is good to know. I also don't give mine tennis balls. But since we have tennis/racquet ball courts right over our backyard fence, we sometimes find one in our yard. Luckily neither of mine are very interested in them and surprisingly Taggart doesn't tear them up.

Thanks for the info. I will let my dog lover friends know.