My turkey eggs from Ok Carla are out wandering around pecking things.
I think Guineas are very good for insect control. I don't really like them--they tend to pester my dear sweet hens and steal their food--but they really do eat bugs. Lots of them. There is a noticeable difference in the bug level since we started having Guineas.
I can't say so clearly about snakes, but I seldom see one. I have Peacocks and Guineas and both are good to run off snakes and they must do it, because there are very few around.
Catherine