When it was easy to kill more than you could eat, they killed more and ate the choice parts.
This may be a hard truth, but it is the truth. A lot of people may not like it, but much of the difficulties that we find ourselves in today as a country comes from the desire not to have to face hard truths.
It matters not one bit to the deer if they were killed and eaten or just killed.
What matters, really, is that there is a sustainable population of the animals. It makes no sense to exterminate useful creatures.
Not much respect involved in driving herds of buffalo over a cliff... But it was undoubtedly effective.
Let’s not carried away with: “they killed only what they needed” idea. The “Buffalo Jumps” killed thousands and only a couple of hundred were used for food and hides.