I found a guinea nest fairly close to the coop a few days ago. I took out the 3 eggs and replaced them with marble eggs. I collected 3 more guinea eggs yesterday. Went out this afternoon, found 4 guinea eggs, but the marble eggs are gone. I looked all over for them, they are nowhere to be found. I am thinking fox. Haven't seen the fox since I took a shot at it. So, since I don't want to loose any more of my marble eggs (they were my grandmothers) I put golf balls in the nest to fake out the guineas. Wonder if the eggs thief will steal those too?