posted 6 years ago
The goats shouldn't have any problem navigating the brambles, thorns and all. When I lived in New Jersey, I had some Alpines for awhile. Over time they ate 7 acres of wild rosebushes that had long tangled branches. Of course that wasn't the only thing growing on that land, but they willingly ate the rose and eventually got it under control to the point where I could pull out the individual plants.
Here in Hawaii I had an area about 1/8 of an acre that was solid thimbleberry growing under guava and persimmon trees, with some mixed grasses. The thimbleberry is incredibly thorny and difficult to tear out. I put 5 goats on that and they cleared it out in about 9 months, though they were moved to rotational pastures from time to time so that they'd get enough fresh browse to eat. They did a great job of getting that thimbleberry down so that I could get in there to remove surface rocks, downed branches, and trim the trees. Some of the thimbleberry is still growing back, but that's ok. It's now part of the rotational pasture system.
It's never too late to start! I retired to homestead on the slopes of Mauna Loa, an active volcano. I relate snippets of my endeavor on my blog : www.kaufarmer.blogspot.com