I had neighbors that needed to clear the underbrush in the woods near their house. The area needing clearing was heavily infested with wild raspberry and blackberry, making a sharp, thorny mess that barely produced fruit as the plants were shaded. The ground was steep, making manual clearing possible only by going in with heavy-duty trimmers or machetes. And either of those options is sub-optimal as the brush could get cut near the
root base, but there would still be long canes full of thorns. They opted to go with rented goats.
When I saw how completely the woods had been cleared I was stunned. Honestly, the forest floor was beautiful--I had never actually seen it before. And the whole area cleared by goats was completely cleared of all shrubby/thorny vegetation.
Go Goats!