Ive never had this problem with mine but a lad i did a bit of lamping with his dog was a tw@t for stealing my dogs catch. It would drop its own catch to take mine and just mince them an piss of to the other end of the feild. After about the second trip i had enough of this as it was starting to disharten my dog and so i havnt been out with him again and as far as i know his dog is still a usless thing that crunches rabbits and wont bring them back. He still thinks its a good dog though.