By Liz Holbrook Jul 7, 2021 | 5:00 PM Some of the goats brought to Wausau by Liberation Farmers LLC in Almond, WI to eat invasive species on Barker Stewart Island. (Photo courtesy of Wausau/Marathon County Parks, Recreation, and Forestry Director Jamie Polley). WAUSAU, WI (WSAU) â A new way of treating invasive species at local parks has come to Wausau. Wednesday morning a trailer of goats arrived in Wausau from Portage County. The goats have been hired by the Wausau & Marathon County Parks, Recreation, and Forestry Department to help clear invasive species on Barker Stewart Island like buckthorn and honeysuckle. A group of goats at work on Barker Stewart Island in Wausau eating invasive species like buckthorn and honeysuckle. (Photo courtesy of Wausau/Marathon County Parks, Recreation, and Forestry Director Jamie Polley).