I guess I have been extremely lucky with my Blue Heeler. She was born on 28 August 1997 so is 15.5 years old now. She has health issues now with widespread arthritis and hearing and sight issues now. She has NEVER been aggressive and has never destroyed anything. She has had the same toys for 10 years and loves and licks them. They have always gone to bed with her. The only thing she did that upset my neighbour when we lived on a property was she took her garden shoes and buried them in our place. She liked to do this for a day or so and then dig them up. I spend a lot of time with her and she just loves everybody. I just love her to bits and I know her time is coming to an end and I don't know how I will cope. All the dogs I've ever had have lived to a long age and Molly is my first blue heeler.