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I trained my dog to only poop in the woods, didn't mean to but I did. He won't poop on the grass he will go up into the brush and pop a squat, if we're hiking he will even go off trail to go, won't do it on the trail. You could train them to poop in one area in a few weeks by taking them on a leash to one area until they poop that's apparently how I did it.