Over 63 years ago Charles Schultz began the Peanuts cartoon. Now they do reruns of it. That makes Charlie Brown about 74 years old. It makes snoopy even older in dog years, about 441 years old. None of us think that is creepy. There you have it though, some people and pets just last forever.
But did Charles actually make his cartoons after real life people that he knew? The obvious answer is of course he did, just like any writer does (even though they deny it) Here is Snoopy, and the Red Baron is hiding in the dog house.