Yea, I did it on a dairy/ pig farm, there is a lot of them, a lot more than you would think, kind of like zombies. I would use a high end nv mono through the scope and it worked ok, but lighting them up with a red light mounted to the top of the scope made for a more wieldy setup.
That is where these guys made their money, dairy farms and pig farms. Zombies is a good analogy and there were hundreds if not thousands of those little rodents. Amazed me how many there were. They may have used a red light I don’t recall but they had their systems down.