Some dogs will also have different levels of "possession" and retrieve drive. You cannot really put in what is not there. The dog just may not have drive to tug. My current dog loves to run after the ball, and would rather just keep it for himself. I have taught him to bring it back and interact with me a little bit, but what he finds rewarding is the chase, so I work mostly with that. My last dog was completely different, he wanted to bring back whatever toy I was using and fight with me. I see a lot of people trying to fit a square peg into a round hole. Assuming your dog is not a puppy, If the dog shows zero interest in playing tug, they never will have much drive to tug. I have not seen your dog, so I don't know this to be true, but by trying to get the dog to tug, you may actually damage the relationship a little bit. Ultimately, you will have to work with what you have. Short retrieves can be a powerful motivator to some dogs.
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