What ever dug the hole, might not be what ate the eggs.Thanks every one yes it ate three to four eggs and it dug under the coop so I don't think it's a snake but I have had one in my coop before
Good examples of anti-dig apron installation:
http://www.backyardchickens.com/t/1110498/wire-around-coop#post_17093528
https://www.backyardchickens.com/threads/new-coop-project.1169916/page-2#post-18481208