The new grounds crew workers at Haverford College have four legs and voracious appetites. The small Quaker college is using a herd of goats from Eco-Goats in Maryland to pare back an overgrown tract filled with a thicket of invasive vines and shrubs. The herd of 29 living lawn mowers arrived last Monday and will stay until the end of the week, munching its way through an impenetrable 11/2 acres across from the duck pond on College Lane. "They'll work their way in and clean it up," said Bill Astifan, assistant director of the campus arboretum, the oldest in the nation.
The goats have already cleared out a section next to the road that was too thick to see through. It's now littered with gnawed-on branches. This week, they moved to an even denser area and have started to make headway, though on a recent visit most were enjoying a well-deserved afternoon nap. "We're working on goat time," Astifan said. When it comes to clearing unwanted vegetation, goats can provide an ideal alternative to machines and herbicides, according to Eco-Goat founder Brian Knox. They graze in places that mowers can't reach and humans don't want to go, and they eat a wide range of unwanted vegetation, including poison ivy and kudzu. As they eat, they crush the seeds of plants so they can't sprout in the next growth cycle, something machines don't do.
Of course, you can't leave a void in nature. So after the goats are gone, vegetation will grow back. Haverford plans to follow up with a two-legged crew with machinery to clear out what's left and spray small amounts of herbicides to kill off stumps. The goal is to have a walkable woodland instead of an overgrown forest.
And goats graze all day long, so a herd of 30 will munch through a quarter of an acre in 24 hours. Knox, who runs a natural resources consulting firm, said he began leasing goats about five years ago and "it was a wild success." Now he has 135 animals, 70 of whom work on a regular basis. Since it's a mixed herd, several dozen kids are born annually. In fact, 12 mothers are on maternity leave.
Knox leases his goats for about $400 per day plus the cost to erect an electric fence and a barrier fence to keep away spectators. Renting machinery to do the job would cost $2,500 to $3,000 per day, according to Astifan.