What is the longest living pet you have owned?

Well, the longest living pet I owned is the only one I have owned until now. It's a dog, and I've had it for eight years, but I imagine he will be around for many years still, because even thought he's eight years old, he still acts like a puppy, he's very energetic, always running and wanting to go for walks, and hasn't had a health problem in his life, which is great, let's hope he continues like this.