How Many Goats Does It Take To Clear A Field?

I've heard of chicken tractors, but this? Yea, my family has raised goats for decades. We had up to 60 at one time, but only having 6 to keep our fence lines on 30 acres clean currently. They don't do a good enough job with that few.

 

http://www.bing.com/videos/watch/video/goat-massage/206fpgjj?q=animal&rel=msn&from=en-us_msnhp&form=MSNRLL>1=42010

 

Our community association has about 400 acres of open lands. The part that isn't wetlands or ubber environmentally sensitive gets mowed by a herd of a couple hundred goats and sheep a couple of times a year. We are in F8Ls territory. but not on one of his preserves.

This article is about 4 years old, the operation has expanded since then.
Wildlife Heritage Foundation

Edit: Looks like the Wildlife Heritage Foundation does have a hand in managing our Lincoln Hills Onsite Preserves space.