My friend has a 21 year old male BP. He actually eats more. I am not sure if 21 is old though. I have heard different stories of how long they can live, some people say 20 years others say 30 and some even say 40... so I am not too sure if this is a middle aged BP or an old one BUT what I do know is this ball python is way lazy. At night time or when taken out of the enclosure most BP (in my experience) will at least roam around and become curious. This 21 year old BP just sits there. The only time he is active is during feeding, shedding and if he poops in his hide he moves to the other one and just stays there. No night time exploring. He is a big male though, about 1700g-1800g. Not sure if that has anything to do with it. He is healthy though. He eats once every 10 days and has for the last decade or so and very rarely misses a meal. He pretty much acts like any other BP I have ever personally met.