Goatmowers run quietly and use very little fuel. Unfortunately, repeat application is sometimes required: In April I noticed a rather nasty patch of blackberries and weeds behind my garden plot so I built a temporary electric fence and housed a few goats in the area for a month or so. When the patch was cleared, I moved the goats back to the main herd and took down the fence. I shouldn’t have taken down the fence as last week I noticed the blackberries had come back with a vengeance. So, I put back the fence and captured a few goats and put them in. This time, when the spot is cleared I will remove the goats, but not take down the fence!