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Thanks for all your insight. All of your comments are greatly appreciated. One thing that helps is that Rocco has had a fantastic life. He had lots of freedom, went everywhere with us and was never away from us for one day. He is still our buddy! He was able to run in his fenced in yard whenever he wanted too, He ate the best food, lots of venison, and was always in good health. For us he is the perfect dog. I will watch him closely.