Windy Huaman wrote:We planted our tropical food forest without regard to integrating animals in the early years. There are more than 11,000 small tree saplings.
Where is your tropical location that might help others assist you in finding a suitable animal. Do you have year around forage for the animals? How established is your food forest? Do you want the animals for a purpose other than grazing weeds? Are any of your trees poisonous to animals?
Windy Huaman wrote:Maybe sheep? But I assume they would eat the young trees in addition to the herbs.
I find sheep graze the ground very closely and are also selective about what they eat, so you may find they don't eat the weeds you're wanting them to eat and that they end up eating your young trees and sheep should be rotated frequently for parasite control as well as to let the forage recover. My experience with cows in tropical locations is they ate our one and only papaya tree, plus I think they might do damage with their hooves.
You might want non animal weed control, like laying cardboard down and smothering the weeds? Not sure how feasible this would be for 20 acres.