To maintain clearance along a fenceline we would take our herd of dairy goats on a walk to a section of fence line each day weather allowing. They are only going to brows for about an hour at a time anyway then spend time lounging and chewing the cud. With 3 family members our schedule would sometimes allow for 2 or 3 walks per day. With a electric net and shelter, abundance +plans
, you could progressively work down a fence line by letting them out to eat ahead to clear enough to make the move easier for the next section then putting them back in the pen where they will chew on things because they are bored. We had a few sheep as well to maintain the grass. Goats will unite to trample a fence down and sheep and pigs to go under it. Each one clears a different level of growth so consider all three.