We have trapped multiple field mice on our farm.. What harm is there in feeding them to our snakes? in the wild snakes eat wild rodents.. and who is to say that the mice/rats you buy are not carrying mites, diseases and other pests? The barn cats eat them and don't seem to have any adverse effects. And I must admit these mice are very fat (especially those we catch in the feed room) I have not done this I am just curious..