7 eggs from 4 hens?

I was amazed to find 7 eggs in my coop today. But I only have 4 hens!! Hmmm. At first I thought someone had added some. Not. Then maybe that 3 hens layed double. Not. I knew I had tended them yesterday. I remember feeding them a big serving of leftover rice and squash as well as chicken pellets. OK, after thinking rationally, I must have fed them but forgot to bring in eggs. It sure looked cool to see the big nestfull of eggs. Two pinks, one blue, four browns and 2 golf balls all in one nest. Omelet time!