This actually happened last month. I kept noticing chickens on my little tray on the front porch. I think the enticement was the flowers (fake) I had laid there. Story goes I was yakking to my sister and I laid them on the tray and failed to move them for weeks. Back to the story, I checked for several days to make sure the chickens weren't laying there. Nope.
The next week I was just getting home one day and saw a chicken jump down. Bingo. Three eggs. I think it was Who Dat the Americana. They are blue, so it does narrow it down. After I got the eggs, I then stored the flowers. No more eggs there.