system
Given the following post, respond as if you're commenting on Reddit:
human
[Fallout] How is it that Dogmeat manages to stay as healthy as he is?

When not in the possession of the Player Characters, Dogmeat seems to operate mostly independently. As intelligent as he is, how is it that he manages to avoid getting infections (outside of obvious gameplay reasons) if no one is there to clean or heal him?
gpt
It has been 210 years since the nuclear war and collapse of society. A German Shepherd will mature about 2-3 years old so we could be looking at around 70 generations of dogs who have had to survive in extremely harsh environments with little veterinary care. 

Dogmeat is the evolutionary product of a chain of dogs that have survived and thrived in this environment. He is able to heal quickly, be minimally effected by radiation and will rarely get any kind of infection on his injuries. He's basically a superdog.