OK, every state has it's own procedure for retrieving game that is wounded and travels across property lines. In Iowa where I live you are authorized to retrieve your wounded game so long as you leave your weapon(s) on your side of the fence and cross the fence on foot. It's written into the hunting regulations booklet. I used to hunt Missouri every year and at that time the law there was the same. I believe most states have the similar law, the appropriate DNR does not want their resources shot and left to rot. I'm not sure about now as laws change. But I'd call the Missouri DNR and get an answer in case you want to hunt there next year. You might also check the regulations booklet you can pick up at any license outlet store or on line. Good idea to check ahead of time on this subject anyway. If the laws in whatever state allow you to do so, and the landowner throws you off, by all means call a game warden asap. Game does not belong to the property owner, despite his attitude/belief that his land is his exclusive domain and the game is his exclusive ownership, he must abide by the same game laws you do. Also keep in mind this is probably not the owners first rodeo and he knows he has to let you in if you follow the game retrieval laws properly and legally. Just be courteous and leave and call the law, don't get into an argument about rights. BTW, I only do neck shots, you either have a clean miss or a clean kill with the animal dropping in his tracks - taught to me by an old woodsman in Missouri. Good hunting.