Most animals not accustomed to humans are fairly shy, so 50 meters is probably not too much.
I never plan to have my character fight enemies that aren't breathless, although things don't always go according to plan...
Real world bears (and other carnivores) normally avoid people, so often running away even when wounded is probably not a bad simulation.
Animals (excluding cats, which slaughter for the sheer joy of pain and misery) typically kill to eat with as little risk as possible. Humans are dangerous prey that aren't particularly good eating (far too bony).
I know a guy who's been chased by a bull elk twice when out jogging (probably not the same elk). Does that answer your question?
Otherwise females with young are typically a larger danger. Getting in between a bear and her cub is really bad business, and I wouldn't like to get in between a reindeer and it's calf either.
I've seen elks and reindeer with young in the game. Bears and hares should be in there as well, but I haven't seen those.
Bandits don't attack you outright. They rob you, and attack if you resist, but if you hand over your things they'll let you go unharmed. Njerps are bat crazy, and sometimes attack, sometimes not. It feels like they've become more cowardly/gotten a small grain of self preservation in later versions, though.