When the weather warms retire to the farthest room in your house where you can still the area well enough to be safe. From an open door or window (screen removed) and as far away as you can get obtain a good rest; shoot the rifle from inside. The only thing the neighbors will hear is the supersonic crack from the bullet. Standard shorts will reduce this and the regular CB caps will eliminate it. Unless you do this frequently and at times when your neighbors are present, the only thing that will happen is that the cat population will slowly decline. Make too much noise or leave a cat howling as if had been shot may bring unwanted attention. You may need a spotter to watch for unwanted people traffic in the area of operations; safety first