Yep, I really would prefer to not harm the animal, but he's come into my territory and gotten a taste of the menu more than once. My understanding of them is that this wont stop until it becomes too risky or difficult compared to elsewhere, or the food runs out.
I'm fortunate enough to work from home, so I have a timer to get up every 15 min to look around with a 12Ga in hand. This weekend will see some major fence upgrades go into place, turning the easiest access into the hardest.
Eventually, we will need to get the birds confined. We tried tractors a few years back and they didnt work out with our terrain and having a variety of different fowl. Two separate large "runs" for the birds to rotate through is the long-term plan.