Goats are not just a fun way to clear brush and control poison ivy. They love it.
Summary - Pupil shape linked to predator / prey status
From their Abstract published in Science Advances Magazine:
There is a striking correlation between terrestrial species’ pupil shape and ecological niche. Species with horizontally elongated pupils are very likely to be prey and to have laterally placed eyes. Horizontally elongated pupils create sharp images of horizontal contours ahead and behind, creating a horizontally panoramic view that facilitates detection of predators from various directions and forward locomotion across uneven terrain.
Summary - Dairy goats used to clear poison oak do not transfer toxicant to milk.
This study is the first phase in a fourstep project. The overall objective of the
project is to create a complete, low-input biological control system to control poison oak by browsing goats
BBC News - January 2015
The goats fighting America's plant invasion
"...in the US a new weapon has joined the armoury (against invasive plants) in recent years - the goat."
Listen to this story about the benefits of "goatscaping".
Exclusive: Behind-the-Scenes: Goat Interview
The Boston Parks Department has recently turned to a novel idea to help clear poison ivy, oak and sumac: goatscaping. The goats clear unwanted plants and as an added bonus, make fresh fertilizer (goat excrement) back into the environment.
Listen to Boston Public Radio interview with the Goatscaping company, including Birch & Butternut. How, why, where - goatscaping works!