I really, really want to like cow peas. I really do. I can understand why they might stand heavier browse pressure. It's the stem, I think. But, you really have no means of weed control. Advantage to soybeans. I've planted acres of cow peas in some areas where the deer didn't touch them. Other places, they got wiped out in a couple days after they were near maturity and discovered. I'm all soybeans now (as opposed to cow peas). But, then, I'm surrounded by a couple hundred acres of either corn or soybeans depending on the rotation. I try to plant on cycles different than what happens in the production world.