When we first moved in, i announced to mother nature that if they respect our space then nothing will happen. An oppossum, coyote, and three snakes apparently missed orientation and paid the price. If they begin eating eggs or chicks they will come back and in some cases the mammals will teach their offspring. If they are outside the fenced area of the yard, good to go. In yard causing problems? Then bolo. But we will move a snake along to its area if it is in the fence. I like snakes especialky king and rat snakes. They eat rats mice and even the venomous snakes. You want them out there patrolling the perimeter.