We used to have rabbit plagues. You could literally walk around with a stick and a flashlight and be worn out in minutes. Kept a lot of people fed during the great depression.
I remember as a young man with a 22 going through two boxes of bullets off the one fence post. Not nearly as thick as they used to be due to various flea born viruses being introduced to reduce the numbers. I think that they are more fun to hunt than shoot in their hundreds.