I have some kong type toys for Clementine that are about twice the size of a tennis ball. I took the tennis balls away recently because I have read that they are sometimes swallowed. Clementine is getting to be a pretty good size and still loves to chew on stuff. She is like a Roomba, as she can and will pick up anything in her path so I keep a close eye on her.
In your opinion, what size play ball is too large to be swallowed? They have some on Amazon that look like they can't be chewed apart.