Notice the wall of green in the background of this picture. That is what this woods looked like before goat grazing. After the site was grazed some sites can benefit from using riding lawn mowers to cut smaller buckthorn back and ground level. The goats leave the area open enough so you can avoid large logs and rocks that can damage your blade.
After Goat Grazing Homeowner uses lawnmower to set back smaller buckthorn even more!