Steal an Egg Pet Mutations: Golden, Rainbow, Giant & Tiny Multipliers

Pet mutations are the premium stat multipliers in Steal an Egg on Roblox. When you hatch an egg, the resulting pet has a chance to roll a mutation that multiplies its base cash generation, speed bonus, or both. This Steal an Egg pet mutations guide covers every mutation type, its income multiplier, visual effect, and how mutations stack with fusing and gamepasses.

A mutation can turn an ordinary A Tier pet into an S Tier equivalent through raw stat multiplication. Understanding which mutations to chase and how they stack is essential for endgame pet optimization.

Mutation Types Overview

There are four primary mutation categories in Steal an Egg. Each applies a distinct multiplier and visual effect to the hatched pet.

Mutations roll independently of the pet's species and tier — a Common Dog can roll Rainbow, and a Divine Dragon can roll Tiny. The mutation multiplies the pet's base stats, so a Rainbow Dog still earns less than a non-mutated Dragon, but a Rainbow Dragon is the strongest pet in the game.

Golden Mutation

The Golden mutation provides a 2x income multiplier to the pet's base cash generation. It also applies a distinctive golden particle effect that makes mutated pets visually stand out in your pen.

• Multiplier: 2x cash per second
• Visual: Golden particle aura
• Stacks with: Fuse upgrades, gamepass bonuses, VIP cash boost
• Best use case: Mid-game pets where a 2x multiplier bridges the income gap to the next biome threshold

Golden is the most common mutation roll and serves as a reliable income booster for your working pen. If you hatch a Golden A Tier pet, it often out-earns a non-mutated S Tier pet until you can fuse or hatch a better alternative.

Rainbow Mutation

The Rainbow mutation grants a 5x cash boost — the highest income multiplier in the game. It applies a vibrant rainbow aura to the equipped pet, making it immediately recognizable.

• Multiplier: 5x cash per second
• Visual: Vibrant rainbow aura
• Stacks with: Fuse upgrades, gamepass bonuses, VIP cash boost
• Best use case: Endgame pets (S Tier) where a 5x multiplier creates a dominant income engine

Rainbow is the rarest mutation roll and the primary target for endgame pet optimization. A Rainbow Dragon or Rainbow Phoenix generates more cash per second than any other pet configuration in the game. Stack luck boosts during high-tier egg hatching to maximize Rainbow pull rates.

Giant / Huge Size

The Giant (Huge) size mutation triples the pet's base stats — both cash generation and speed bonus. Visually, the pet's model is significantly larger than standard.

• Multiplier: 3x base stats (cash AND speed)
• Visual: Larger pet model
• Stacks with: Golden/Rainbow mutations, fuse upgrades, gamepasses
• Best use case: Pets where the speed bonus multiplication matters as much as cash — useful for players pushing into deeper biomes

Giant is a hybrid mutation that boosts both income and movement utility. A Giant Tiger, for example, gets 3x its normal speed bonus, which can be the difference between escaping a Volcano Hellhound and getting caught.

Tiny Size

The Tiny size mutation offers increased player speed utility and faster hatching time bonuses. Visually, the pet's model is smaller than standard.

• Multiplier: Speed utility + faster hatch time
• Visual: Smaller pet model
• Stacks with: Other mutations, fuse upgrades
• Best use case: Utility pets equipped during treadmill training or egg hatching sessions

Tiny is a niche mutation valued for its hatching acceleration rather than raw income. Players running multiple incubators often equip Tiny pets during hatching sessions to reduce overall incubation time across the roster.

Mutation Stacking Rules

Mutations can stack with each other and with other multipliers:

• Golden + Giant — a pet can roll both Golden (2x income) and Giant (3x base stats), yielding 6x effective income.
• Rainbow + Giant — the rarest and most powerful combination: 5x income × 3x stats = 15x effective income.
• Mutations + Fuse — mutations carry through fusing. A Golden Dog fused into an Uncommon retains its Golden mutation.
• Mutations + Gamepasses — mutation multipliers stack multiplicatively with the VIP +20% cash bonus and the Lucky Hatch Gamepass's improved roll rates.

Pro Tip: The Lucky Hatch Gamepass doubles your chance of rolling Legendary, Mythic, and Divine pets — and community reports suggest it also improves mutation roll rates. Stack Lucky Hatch with any active luck boost codes from our Codes page for the best mutation pull odds.

How to Farm Mutations

Mutation rolls are random but can be influenced:

1. Hatch more eggs — every hatch is an independent mutation roll. More hatches means more mutation chances.
2. Stack luck boosts — Lucky Hatch Gamepass + any active luck boost codes from our Codes page during hatching sessions.
3. Target high-tier biomes — deeper biomes drop higher-rarity eggs, and higher-rarity pets benefit more from mutation multipliers (a Rainbow Dragon is worth far more than a Rainbow Dog).
4. Use Auto-Hatch — the Auto-Hatch Gamepass lets you run continuous hatching sessions without manual collection, dramatically increasing hatches per hour.

See our Gamepasses Guide for the full breakdown of hatching accelerators.

Frequently Asked Questions

Can a pet have multiple mutations?

Yes. Pets can roll both a color mutation (Golden or Rainbow) and a size mutation (Giant or Tiny) simultaneously. A Rainbow Giant pet is the rarest and most valuable configuration in the game.

Do mutations carry through fusing?

Yes. If you fuse three Golden Dogs, the resulting Uncommon Dog retains the Golden mutation. This makes fusing mutated duplicates a powerful way to scale mutation benefits up the tier ladder.

Which mutation is best?

For pure income, Rainbow (5x) is the best. For hybrid income + speed, Giant (3x base stats) is the best. For endgame optimization, Rainbow + Giant combined is the strongest possible configuration.

How rare are mutations?

Mutation roll rates are not officially published, but community experience suggests Golden is the most common mutation, Rainbow is rare, and Giant/Tiny sizes are uncommon. Luck boosts appear to improve roll rates.

Do mutations affect the Pet Index?

No. The Pet Index tracks species discovery, not mutations. A Golden Dog and a standard Dog both count as the same entry in the Pet Index.