Not sure about prairie dogs as I've not ranged anything that small. This past deer season I ranged deer at 800, black Angus cows at 950, tree rows at 1790 and a farm house at 2850. My hunting partner has a Swarovski, he was so impressed with my Kilo he ordered one using his phone right there in deer camp. I think he would have had them overnight the thing to him if the pasture we camp in had an address. :)

I'm pretty happy with mine.