Raising goats can get expensive if you are carting in all of their feed. Planting some fast growing plants to supplement their diet can help save you money and add variety to their feed.
The list in this post tend to be easily grown, fast growing, or weedy plants that are prolific and that you can include in a smaller space to provide more food. I planted bamboo and willow along the edge of our goat yard, and even on our tiny homestead they produced a good amount of supplemental food for our girls.
If you are thinking about goat farming, I recommend planting now so your goats have plenty of forage, and if you already have goats, hopefully you can add a bit more variety to their diet and save on some hay costs for you.