[HankB99]

Our kids have a Rottweiler that loves to chase a ball, Bring it back and then dare us to try to take it away from her. She can drop if convinced. Or I have a second ball that is more interesting, causing her to drop the other ball. She can hold two balls in her mouth so I have to wait for her to drop the first ball before I throw.

She also has a large (about 1 food diameter) ball that can't possibly fit in her mouth and I can kick that at which point she'll drop the little ball and try to get the big one in her mouth.

[MaxfordAndSons]

Yea the "No take, only throw" game seems more endemic to Mastiff descendants, as opposed to the true "retrieval" behavior described in the top comments about Retrievers. My boxer/bulldog mix loves to chase the ball, but will fight like hell to not give it up. Like you, I rely on bribery or manipulating the properties of the ball to make it more easily relinquished.

[epiccoleman]

My trick with my previous dog was to just always have two toys for the fetch session. She'd usually drop the one she was holding when I wound up to throw the next one. Kinda like juggling.