You need to do a Camera Survey and figure out if you have any deer. That's the biggest thing. If the answer is low numbers then.... Not much you can do.

Maybe ask the neighbors to stop shooting all of them. With no season limits on does this is getting more and more common. I've got a couple tracts that I can't really lease because there ain't no deer. And I just don't do that to people, i.e. letting them figure that out after they paid. Billy Bob that lives down the road kills every one he sees.