Hole in chicken coup, what could it be?

[aggieangl01]

Hi there!

I found a hole under the ramp of the girls coup. I also noticed eggs go missing once in a while and today when cleaning their feeder I found what looks like are mouse droppings. Do mice or rats dig like this? What could it be?

 

[junebuggena]

Rat, gopher, mole, vole, shrew, ground squirrel. Lots of options.