from here;
http://www.psnh.com/Energy/Sheep/fastfacts.asp
Why try sheep?
Sheep are natural lawnmowers, effective at clearing vegetation. Although they eat many different types of vegetation, sheep favor the leaves of young maple, oak, cherry and birch. These are problem species for electric utilities -- if left unmanaged; they will grow tall enough to interfere with the transmission lines
How many sheep were used in the project?
In its first year, the Grazing Power Project consisted of approximately 500 sheep. Following a successful first year, the flock doubled in size for year two. In years three, four and five the flock consisted of about 1200 sheep
- Stuck