Hitting a dead deer or an alive deer is all covered under the same coverage.
Any time you have a run in with an animal, whether they run into you or you run into them, it is covered under your comprehensive coverage on your insurance policy. This includes if the animal that you hit is dead.
So if you are driving and you hit a dead deer that was laying in the road from someone hitting it earlier, your insurance company is going to repair the damages under your comprehensive coverage. This also means that your comprehensive deductible applies, not your collision deductible.
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