well I suppose you don't know for certain that they are there. All you can do is ask the rancher and use your own judgement on his honesty. I know this much though, that in the units around gillette ie 23, 24,etc that there are goats everywhere. If a rancher in one of those units told me that he had lots of them I would most likely believe him. If he told me that he had "big" lopes I would be hesitant. Those units are not known for large bucks, though some certainly do reside there.