in school monday i was flipping through one of my books and it said that the lifespan of a deer was 20 years max but they werent saying if that was in the wild. now this is my question. if a deer is in the wild hunted of not cause if it gets killed it dont matter. would a deer EVER be able to make it to 20 years old where i am at i would say that an 8 year old deer is old . but could a deer make it that long in captivity with adequate food and water.