I have had limited experience with goats --actually a goat. But what I learned from her is that goats need woody browse, not just perennial grasses. Sheep can manage on grass, but goats like shrubbery. Well they especially like roses, and there actually are some of the old taller roses that would help provide browse, but you would have to move them, and let the roses regrow. Holly would be good.
I had to return my goat to the woman who gave her to me as a present, because I ran out of browse and my goat tried to eat camellias and wisteria--both of which are poisonous to goats.
Good luck. If you can meet their needs and keep them healthy, goats are very rewarding. Actually they have a sense of humor about entertaining humans that you will come to appreciate.
I forgot to say: I am in Zone 8, Alabama. One thing my goat did like to eat that I liked to get rid of was privet.
