Yes I have. It can be very difficult to cure and really just depends on how much drive the dog has to get game in it's mouth. It would take a lot of typing to tell you step by step what I do but I'd happily give you my number and discuss it with you for a few minutes on the phone. I type pretty fast but I can convey things through voice much faster and more efficiently when it comes to something like that. I'm going to have to get a little sleep soon but I'll check back tomorrow for sure.