Nation Invasive plants, weeds are causing problems at a New York park. The solution: Hungry goats. June 30, 2022 Saleen Martin, USA TODAY Comments Off on Invasive plants, weeds are causing problems at a New York park. The solution: Hungry goats. Alison Ettinger-DeLong from the Riverside Park Conservancy said goats can eat porcelain berry, English ivy, mugwort and even poison ivy, she said.