Hello! Murphy has been in his harness a handful of times, but I cannot get him to stop biting the clasps and rings that hold it together on his chest. He's not crazy about millet, so that's not really a training option. I tried tying some strings to the clasps so he has something else to chew on, but it's s no-go. I think he likes walking around with me, but he is just so fixated with those darn metal clasps. Suggestions?