I've heard that wheat straw is bad for goats. I have no idea about actual wheat growing... I understand rye grass is good for them. You have to be careful with some kinds of fescue as well as that can poison them. Any bushes you'd buy and plant, the goats would wipe out in a matter of days. They'd need years of growth to become established for the goats to browse on them.The goats would probably enjoy just plain old woody weeds over any grass that you plant. You'd just need to give it time to grow back between times that your goats are out there eating it.