Very damned few. I like to say “Rabbits never die of old age.” Picture the worst street in the worst neighborhood in the town where you live. Now imagine yourself walking down that street at night, and in every alley you pass, you see the glint of unsheathed knives. THAT is what the life of a rabbit is like. read more
So it seems that in the wild, they do not die of "old age", if we consider old age to be the age they can reach when under the care of humans, away from danger, competition, starvation, disease, fights with other lions, etc. read more
Some social animals may live long enough to die of diseases related to advanced age, such as cancer or organ failure, but it will be rare, as even in social animals there is a tendency to reject those that are too frail or sick. read more