@Jose fina Arenas,
Do you mob graze your goats?
If you want to clear pasture of weeds, make a paddock large enough for the number of your goats to eat 80% of everything in the paddock in 2 days. On the third day, move them to the next paddock. Move them in a loop like fashion so by day 45, you can put them back into that very first paddock. Anything that has grown in those past 45 days, they will mow down again. If you can do this twice, better 3 times, as season, the following year you will see drastically reduced amount of weeds and increases in grass.
I have recovered several acres, cleared small trees and unwanted shrubs using this method over a few years.
