I wish I had that problem. Both of my dogs will fetch any toy that is thrown and bring it back. Smudgw won't always release it though choosing instead to sit and chew on it for a bit but eventually he'll give it up, and Winter is OCD about fetching toys. She'll make you throw things for hours if she thinks she can get away with it, and if you don't take the toy right away she throws it in your lap.