Great story about Harley. He sounds like our two Jack Russell Terriers, Chasie and Chloe. They also mean the world to us, and are real characters. That is what makes them so appealing to us, as pets. That is wonderful that Harley is still so active at 10 years old. Our 9 year old has slowed a bit, but that is another appealing thing about Jacks. That they have unlimited energy well into their older years, making them appear to be puppylike. Our Chase, the male, is a puddin' dog. (short legged) If someone sees him, they think he is a young dog, at 9 years old. Then we have Chloe, our female, long legged, who just turned 1 year old, and is like the energizer bunny. We have a large yard, about 1 1/2 acres fenced in, and they both have a ball when outside. That is what they need. The opportunity to be safe, and be able to run off some of that endless energy.