And what rifle does he have? A .22 would be useless. A 50 caliber machine gun with unlimited rounds would take care of everything except maybe the rats.
My dog figured out how to play fetch with himself. He would catch a grasshopper and then roll on his back and let it jump out of his mouth. He would then wiggle and roll over trying to catch grasshopper before it hit the ground again.
I would still have some, but my kids all ran out and I shared with them.