If you’ve unlocked the Coop inside the Cleanse Walker in Beast of Reincarnation and wondered where the chickens are supposed to come from, you don’t buy them or receive them automatically. You have to find Fertilized Eggs while exploring the world.
These are easy collectibles to overlook because Fertilized Eggs don’t simply sit around with a giant egg icon above them. They’re hidden inside Bird Nests, and the map treats them as Valuables.
Getting at least one early is worth doing. Hatch it at the Cleanse Walker and your new chicken will start producing regular eggs, giving Kagura more ingredients for recipes and their permanent buffs.
Here’s how the entire Fertilized Egg system works and where you can find your first one.
What Are Fertilized Eggs in Beast of Reincarnation?
Fertilized Eggs are special exploration items used to obtain chickens for the Cleanse Walker’s Coop.
The basic process works like this:
Find Fertilized Egg → Return to Cleanse Walker → Place Egg in Incubator → Hatch Chicken → Chicken Produces Eggs
Once your chicken has hatched, you don’t need to manually walk into the Coop every few minutes and collect what it produces.
Regular eggs are harvested automatically over time.
That’s particularly useful because eggs are ingredients for Kagura’s cooking recipes, and those meals can provide permanent buffs.
So while chasing Fertilized Eggs might initially look like optional farming content, the Coop can contribute directly to character progression.
How to Hatch Fertilized Eggs
Once you’ve picked up a Fertilized Egg, return to the Cleanse Walker.
Head into the Coop and look toward the back for the Incubator.
Interact with it and place your Fertilized Egg into an available slot.
The egg will eventually hatch into a chicken.
That chicken then stays at your Coop and begins producing fresh eggs over time.
You don’t have to repeatedly find Fertilized Eggs to get normal cooking eggs. The Fertilized Egg gives you the chicken; the chicken becomes your renewable source.
How Many Chickens Can You Have?
Initially, the Incubator only gives you one Fertilized Egg slot.
Don’t worry about that too much when you’re starting out.
You can eventually expand your available capacity using Facility Modules, allowing you to maintain more chickens aboard the Cleanse Walker.
So far, six chicken slots have been confirmed.
There appear to be around 11 Fertilized Eggs hidden throughout the game, although not all of them may ultimately be usable if the Coop remains limited to six chickens.
For most players, that’s not really a problem.
One or two chickens can already provide a decent supply of eggs during the first half of the game, particularly if you regularly return to/rest at the Cleanse Walker.
How to Find Fertilized Eggs
Here’s the most useful thing to remember while searching:
Fertilized Eggs appear as Valuables on the map.
If you see the Valuables icon nearby, investigate it.
It won’t necessarily be a Fertilized Egg because other valuable items use the same marker, but it’s your biggest clue that one might be close.
There’s another clue that’s arguably even better:
Chickens.
Fertilized Eggs are found inside Bird Nests, and those nests are generally placed around chickens.
If you unexpectedly stumble into a group of chickens while exploring some random corner of the map, don’t just run past them.
Search the immediate area.
There’s a good chance there’s a nest nearby.
Where Are Fertilized Eggs Found?
Fertilized Eggs have been discovered across multiple regions of Beast of Reincarnation.
Known/searchable regions include:
| Region | Fertilized Eggs |
|---|---|
| Ogouchi Buffer Zone | Yes |
| Ancient Civilization Zone | Yes |
| The Great Wall Terraces | Yes |
| Pilgrim’s Zone | Yes |
| Matsukawa Zone | Yes |
| Fuji Frontier Zone | Yes |
| Giant Tree Zone | Locations still being documented |
| Crater Zone | Locations still being documented |
| Inukami River Zone | Locations still being documented |
| Starfall Tower | Locations still being documented |
One of the most useful eggs is naturally the first one, since getting your Coop running early means you’ll start accumulating cooking ingredients while continuing through the story.
Fortunately, you can get one in the Ogouchi Buffer Zone.
Ogouchi Buffer Zone Fertilized Egg Location
Your first Fertilized Egg can potentially be collected very early in Beast of Reincarnation.
It’s found around Cliffside Village: Outskirts in the Ogouchi Buffer Zone.
There’s one catch:
The egg is underground.
That’s why simply walking directly toward its Valuables marker can make the location seem confusing.
You need to find the entrance leading beneath the area first.
Start From Village Surroundings Campsite
Use the Village Surroundings Campsite as your main reference point.
From the campsite, travel northwest toward the nearby rice field.
You’re looking for a strange-looking pile of miscellaneous objects sitting on a platform in the rice field.
It looks suspicious enough that you may naturally investigate it anyway.
That’s where you want to be.
Find the Underground Entrance
The Fertilized Egg itself isn’t sitting on this platform.
Instead, search around this location for the route leading underground.
Once you’ve found the entrance, head below and start moving in the direction of the Valuables marker.
This is where the map marker becomes much more useful.
Follow the Valuables Marker
Continue underground while keeping an eye on the Valuables indicator.
Eventually, you should reach a cliff/drop that you can jump down from.
Look below before leaving the area.
You should notice something that confirms you’re in the right place:
chickens.
Whenever chickens and a Valuables marker appear together, you should immediately start searching for a nest.
Drop down toward them.
Collect the Fertilized Egg
Search around the chickens for the Bird Nest.
Interact with it to collect your Fertilized Egg.
That’s your first chicken sorted.
The location is much easier once you know that the collectible is underground. Trying to reach the map marker entirely from the surface is what makes this one unnecessarily frustrating.
What Should You Do After Finding Your First Fertilized Egg?
I’d take it back to the Cleanse Walker fairly soon rather than carrying it around while continuing to explore.
Place it into the Incubator and get your first chicken started.
There’s little benefit to waiting.
The sooner your chicken is active, the sooner you’ll begin passively accumulating normal eggs for Kagura’s recipes.
After that, you don’t necessarily need to rush out and collect every Fertilized Egg on the map.
Do You Need All Fertilized Eggs?
Not really, unless you’re specifically trying to collect everything.
For practical gameplay purposes, one or two chickens should be enough early on.
How many eggs you actually accumulate will depend partly on how frequently you’re returning to and resting at the Cleanse Walker, along with how often you’re cooking recipes that require eggs.
Later, as you obtain Facility Modules and increase your Coop capacity, adding additional chickens becomes more worthwhile.
But don’t treat finding all 11 potential Fertilized Eggs as an early-game priority.
Get your first chicken running, continue progressing normally, and grab additional nests whenever exploration takes you near them.
What Are Regular Eggs Used For?
The normal eggs produced by your chickens are primarily useful for Kagura’s recipes.
That’s more valuable than it initially sounds.
Cooking isn’t simply there for temporary healing or a little role-playing flavor. Recipes can provide permanent buffs, meaning ingredients generated by your Cleanse Walker facilities contribute to long-term progression.
Having a renewable egg supply means you don’t need to rely entirely on finding ingredients out in the world.
It’s essentially another passive resource system working for you while you explore.
How to Get Golden Eggs
Your chickens can occasionally produce something much more valuable than an ordinary egg:
Golden Eggs.
A Golden Egg can be sold for 600 Amber.
They’re not something I’d build an entire money-making strategy around because you’re relying on the special egg appearing, but they’re a nice bonus from a facility you’re already using for cooking ingredients.
More chickens should also mean more opportunities for egg production as you continue upgrading the Coop.