First of all, 40 acres is very little land. It won't hold that many deer period, bucks or does. If there is no food,water, and cover, then it won't hold squat. If you had a couple of nice bucks on the property, they may be dead now. During the rut, bucks will travel many miles. Maybe another hunter killed a buck or two that was living on your property. Some properties hold bucks, while others don't. That's just how it is. Like some have said, maybe planting year round plots can help. The problem is, everybody else is also feeding their deer, so it may be difficult to draw them away from other properties, but if you give them the right combination, they will come. You have to remember, a bucks natural home range, not including the rut period, is 2 to 3 square miles. A does natural home range is 1 square mile or less. This means your 40 acres probably isn't going to hold a ton of deer. It's not capable of holding too many.