Farmville secrets guide - Mystery Eggs are one of those wonderful treasures to cultivate in Farmville. The first requirement of course is chickens. If you don't have chickens, no eggs. The second item you need is a chicken coop. The best way to start off with both chickens and a coop is to find a neighbor with too many. They can only use one coop, and many times have an extra one sitting in a gift box, and are unable to use it. You can even offer to buy a chicken coop if you can't find one as a gift.