Quick answer
Take three animals of the same species — any weights — to the Animal Merging machine in the Safe Zone. It returns an egg that hatches a heavier variant of that species, and submitting heavier animals raises the weight of the returned egg. There is no reported daily limit.
Steps
1. Collect three of the same species
Gather three animals of one species. Weight does not matter for eligibility — any three of the same species qualify — but heavier inputs are reported to raise the weight of the result.
2. Use the Animal Merging machine in the Safe Zone
The machine sits in the Safe Zone. Submit the three animals and it returns one egg instead of them.
3. Hatch the returned egg
The returned egg hatches a heavier variant of the species you merged. Heavier means more value and more Cash per second once it is parked in your pen.
4. Repeat with the duplicates that are left
There is no reported daily limit, so merge in batches whenever duplicates pile up. Duplicates stop being clutter and become higher-earning versions of the animals you already own.
Why merging beats hoarding duplicates
Your pen has limited slots, and every slot spent on a duplicate of a light animal is a slot not earning what a heavier variant could. Merging converts three same-species animals into one egg with a heavier variant, which is why the pets page calls duplicates upgrade material rather than clutter.
What is not verified
The exact weight formula of the returned egg is not published by any source this site trusts — the guides confirm only that heavier inputs raise the output. Hatch odds of the merged egg and whether merging can change rarity are also unverified.
Frequently Asked Questions
What is the Animal Merging machine for?
It takes three animals of the same species, of any weight, and returns an egg that hatches a heavier variant of that species. Adding heavier animals to the machine raises the weight of the egg you get back, so duplicates stop being clutter and become higher-earning versions.
Does the weight of the three animals I submit matter?
Yes, for the output. Any three of the same species qualify regardless of weight, but submitting heavier animals raises the weight of the egg the machine returns. The exact formula has not been published by any source this site trusts.
Related resources
Pets
How Break and Steal an Egg animals work: obtaining them from eggs, weight-driven income, pen capacity, merging and index rewards.
Animal Merging and Duplicate Animals
Merging is the game's answer to duplicate animals. Three of one species go in, and an egg that hatches a heavier version of that same species comes out.
Eggs
Every reported Break and Steal an Egg egg by zone, with rarity tiers, guardian difficulty and the break-steal-hatch loop.