Fertile Eggs is an Item that can only be found in the form of Golden Pupa loot. Upon being picked up, any Chicken and Turkey eggs harvested by the player have a 10% chance to hatch, giving the player another Chicken or Turkey respectively. When a Chicken or Turkey hatches, a "BKAW!" message will appear above the egg accompanied by a puff of feathers and a new, given poultry spawning. When an egg hatches, the player still receives Cashews from it at the end of the day, as if it was harvested as normal. The maximum number of Chickens and Turkeys the player can have at once is 26. Note that this is a shared maximum between the two; it is not separate. This can effectively be thought of as the player only being allowed to have 26 birds total.
There are no other Items in the game that can actively generate new Farm Animals for the player, making Fertile Eggs unique in that regard. If taken early enough and supplemented with a few Chickens and Turkeys, the player will not have to worry about cutting Weeds very often for the majority of the run. Furthermore, it is recommended to try and avoid Weed cutting items such as Weed Wacker and Herbicide if the player has Fertile Eggs, as they will become useless as the number of Chickens and Turkeys the player has increases. This Item can also provide a decent way of earning some extra Cashews. Fertile Eggs also provides extra utility when combined with items like Chicken Caliochory, Avian Placenta, Spring Chicken, and other friend upgrades.
The following is a list of possible Items that can affect Fertile Eggs:
- Thyme Flies: Fertile Eggs moved to the normal loot pool.
- Doom and Bloom: Fertile Eggs moved back to the Golden Pupa loot pool.
- Patch 1.5.3f1: Poultry cap increased from 20 to 26 birds.