My main problem around here is when a Tegu tries to eat a chicken or a quail. I don’t kill them, I just can’t. But I do trap the ones that are eating my animals and find a place for them. And I have never had a problem with snakes they just don’t try to eat anything but the mice. One time my neighbor put out something that killed a lot of snakes. There were mice everywhere and it was really bad. Fortunately they are back now. That was a few years ago. We told him to stop using it since it was killing off the snakes and fortunately he did and there’s a lot around here now.