In this Monday, Oct. 24, 2016 photo, a goat grazes after being released into a 3-acre enclosure in Cottage Grove, Minn. A herd of 20 goats are grazing on invasive plants at Cottage Grove Ravine Regional Park for a week or two, kicking off the county’s efforts to use a non chemical approach to a buckthorn infestation. (Scott Takushi/Pioneer Press via AP)