Thunder Egg: Drop Rates and Odds
What this page helps you decide: whether the Thunder Egg is worth farming, and how many hatches its best drop actually costs
The Thunder Egg hatches 16 documented chickens, topping out at Celestial with the Prism Rooster at under 1% — about 200 hatches on average. You get the egg itself by keeping a Sergeant Hen on your plot, which lays it at 100%. The full table is below, along with what we found when we added the percentages up.
The published rates do add up
Adding every listed chance on this egg gives exactly 100 percent, which is a point in this table's favour: 9 of the 17 tables in the same index do not, ranging from 91 to 102 percent. It still contains entries written as "under 1%", so the top end remains imprecise even though the total is clean. That makes the ordering below trustworthy even if individual figures are rounded.
What the ceiling is worth chasing
The rarest thing this egg produces is the Prism Rooster, a Celestial at under 1%. That works out to roughly 200 hatches before you should expect one. It is the only Celestial on this egg, so a long session has exactly one payoff worth naming. 8 of this egg's outcomes appear nowhere else in the drop data — Static Chick, Frostbite Hen, Quake Rooster and others. Those are the ones that justify farming this egg specifically rather than treating it as a stepping stone.
Where this egg sits in the chain
The Thunder Egg is laid by the Sergeant Hen at 100%, so keeping one on the plot is the whole supply line — there is no shop or event step in between. Hatching it also moves you forward: 4 of its outcomes lay eggs of their own — the Commando Rooster lays the Ordnance Egg at 70%, the Astro Chick lays the Void Egg at 70%, the Sergeant Hen lays the Thunder Egg at 100%, among others. That is the practical reason to farm this egg even after you have the chicken you came for.
Step-by-Step
- Put a Sergeant Hen on the plot — it is the only documented source of this egg (100%).
- Decide what you are farming for. The ceiling is the Prism Rooster at under 1%, about 200 hatches.
- Note the 8 chickens that appear nowhere else — those are the reason to farm this egg specifically.
- The percentages here do sum to 100%, so the ordering is safe to plan around.
Data Tables
| Chicken | Rarity | Published rate | Expected hatches | Also from |
|---|---|---|---|---|
| Static Chick | Common | 14% | 7 | Nothing else |
| Commando Rooster | Epic | 12% | 8 | Ordnance Egg |
| Astro Chick | Legendary | 11% | 9 | Void Egg |
| Frostbite Hen | Rare | 7% | 14 | Nothing else |
| Quake Rooster | Rare | 7% | 14 | Nothing else |
| Sergeant Hen | Rare | 7% | 14 | Scratch Egg, Ordnance Egg |
| Tsunami Hen | Rare | 7% | 14 | Nothing else |
| Viking Rooster | Rare | 7% | 14 | Nest Egg, Scratch Egg, Fang Egg |
| Thunderclap | Epic | 5% | 20 | Nothing else |
| Crest Rooster | Epic | 5% | 20 | Scratch Egg, Royal Egg |
| Magma Rooster | Epic | 5% | 20 | Nothing else |
| Sandstorm Rooster | Epic | 5% | 20 | Nothing else |
| Founder Rooster | Legendary | 3% | 33 | Royal Egg, Fortune Egg, Fang Egg, Blazing Egg, Ordnance Egg |
| Twister Hen | Legendary | 3% | 33 | Nothing else |
| Aurora Hen | Divine | 1% | 100 | Blazing Egg |
| Prism Rooster | Celestial | under 1% | 200 | Blazing Egg |
| Rarity | Outcomes | Share of the table |
|---|---|---|
| Common | 1 | 14% |
| Rare | 5 | 35% |
| Epic | 5 | 32% |
| Legendary | 3 | 17% |
| Divine | 1 | 1% |
| Celestial | 1 | 1% |
FAQ
How do you get the Thunder Egg in Grow a Chicken Fighter?
Keep a Sergeant Hen on your plot. It lays the Thunder Egg at 100%.
What is the rarest chicken from the Thunder Egg?
The Prism Rooster, a Celestial at under 1% — roughly 200 hatches on average.
How many chickens can the Thunder Egg hatch?
16 different chickens are documented, spanning 6 rarity tiers from Common up to Celestial.
Sources
- Community Grow a Chicken Fighter Eggs Index (community drop table) — Single community source for every rate on this page. Captured 2026-08-27. We recomputed all 17 tables in that index: 9 do not sum to 100%, ranging 91–102%.