could my chickens be eating their own eggs?

[mylittlehof]

I've found an egg open and empty in the nests several days in a row now. Could one of the chickens be eating the eggs or some other critter creeping in and eating it? The fencing around the coop could allow a rat or small mammal in the coop. Thanks

 

[Uppity Peon]

Very possibly. Try leaving them a blown egg full of mustard to break them of that habit.