Pets in Build a Ring Farm sit alongside seeds as the second big lever for making money. Each one adds a permanent earnings multiplier to your crops and runs a passive effect on a timer, from upgrading mutations to instantly growing plants. Getting the right pets onto your farm floors is the fastest way to turn a slow grind into a steady cash flow.
How pets work in Build a Ring Farm
Every pet does two things at once. The earnings boost is a flat multiplier on the money you make from selling crops, so a 5x pet means five times the income on the floor where it sits. The passive ability is the automatic effect the pet runs on its own, firing on a cooldown that ranges from one minute to fifteen.
Those passives split into a few families. Some upgrade crop mutations to a higher multiplier, some fully grow random plants to skip waiting, some apply fertilizers or pet treats, and a few give static boosts like extra seed luck or crop yield. Mutation-upgrading pets are the most valuable late game because they keep pushing crop sale values higher without you doing anything.
Pets can be leveled up to a cap of Level 50. Leveling raises both the earnings multiplier and the passive's effectiveness. A Regular Mammoth, for example, climbs to a 5.53x earnings boost and a 54% chance to upgrade a crop's mutation every 10 minutes once it hits Level 50. Most pets also come in Regular, Big, and Giant sizes, with the larger sizes giving stronger boosts.
How to get pets from the Egg Merchant
The main way to collect pets is hatching Eggs from the Egg Merchant, found at the far end of the map. Each Egg rolls a random pet from its own pool, with higher-tier Eggs holding rarer and stronger critters.
Step 1: Travel to the Egg Merchant's shop. Open the stock and check which Eggs are currently available, since the lineup is decided by RNG and changes over time.
Step 2: Unlock as many of the five Egg slots as you can. The first slot is free, and the rest cost Cash. Owning more slots lets you hold more Eggs at once and improves the odds that a rare Egg appears in stock.
Step 3: Buy the Egg you want when it shows up. A Basic Common Egg starts around $25 million, while higher rarities cost far more. The shop stock rerolls every five minutes, so check back often if the Egg you need is missing.
Step 4: Open your inventory, equip the Egg, and press the Left Mouse Button to hatch it. You will receive one random pet from that Egg's pool, which you can then place on a farm floor.
Epic Egg pets and drop rates
The Epic Egg is the priciest non-seed item for free-to-play players, costing 25 trillion Cash when it appears in the Merchant's stock. It holds eight pets across Uncommon, Rare, Epic, Legendary, and Secret rarities, including the standout Mammoth and Hydra. Because it is not guaranteed in stock, you will need to check back across several five-minute rerolls before it shows up.
| Pet | Rarity | Drop chance |
|---|---|---|
| Elephant | Uncommon | 33% |
| Llama | Uncommon | TBA |
| Crocodile | Rare | 33.33% |
| Gorilla | Rare | 20% |
| Lion | Epic | 20% |
| Polar Bear | Epic | 9.09% |
| Mammoth | Legendary | 1.58% |
| Hydra | Secret | 0.315% |
The Secret-rarity Hydra is the rarest pull from the Epic Egg and the biggest prize, with the Legendary Mammoth a close second. Both upgrade crop mutations on a timer, which makes them worth the long grind for a single drop.
Limited Kitsune Pack (Robux only)
Kitsune is one of the strongest mutation pets in the game, and it is not available from any Egg. The only way to get it is the Kitsune Pack in the Premium Shop, which costs 799 Robux. You can also receive the pack as a gift from a friend.
The Kitsune Pack is available until June 7, 2026, after which it leaves the shop. Buying it gives you three items.
- 1x Kitsune pet
- 1x Super Fertilizer
- 1x Crimson Higanbana seed
Both the Kitsune and the Crimson Higanbana seed are exclusive to this pack. The Crimson Higanbana sells for more than most Exotic-rarity crops, including Trucker's Delight, Void Fruit, and Pepper. When placed on a floor, Kitsune adds $150,000 to the sale value of crops there and, every five minutes, picks a random mutated crop and upgrades its mutation to the next best one. Whether the pet returns after the pack is removed is not confirmed.
How mutation-upgrade pets boost crop value
Mammoth, Hydra, and Kitsune share the same core ability. On their cooldown, they remove a crop's current mutation and replace it with the next best one up the multiplier ladder. The old mutation is dropped, but the replacement always carries a higher multiplier, so the crop's sale value climbs each time the pet fires.
As an example, a Carrot with the Radioactive mutation gets bumped to Rainbow, the top tier at a 5x multiplier. Lower steps move up in order, so a Wet crop (1.35x) goes to Frozen (1.75x), then to Autumn or Void (2.25x), and onward. Because these pets keep ratcheting mutations upward, they are the best tools for maximizing sale prices across a whole farm.
All Build a Ring Farm pets ranked by tier
The table below lists every equippable pet with its rarity, base earning boost, and passive ability, grouped by tier from S (best) down to D. Values shown are base figures and rise as you level each pet toward the Level 50 cap.
| Pet (Tier) | Rarity | Earning boost | Passive ability |
|---|---|---|---|
 | Secret | 12x – 15.5x | Upgrades a plant's mutation every 300s |
 | Prismatic | 6x | 15% chance to upgrade a mutation every 5m |
 | Secret | 5x | 15% chance to upgrade a mutation every 10m |
 | Prismatic | 6x | Grants a 5-minute Time Skip every ~15m |
 | Secret | 6.69x | Applies a Strong Pet Treat every 600s |
 | Legendary | 4.87x | 25% chance to fully grow a random plant every 2m |
 | Epic | 3.76x | 20% chance to fully grow a random plant every 2m |
 | Epic | 3.2x | 10% chance to apply a Super Fertilizer every 5m |
 | Rare | 2.25x | 10% chance to fully grow a random plant every 1m |
 | Legendary | 3.5x | 10% chance to upgrade a mutation every 10m |
 | Secret | 5.23x | Applies a Normal Pet Treat every 300s |
 | Rare | 2.12x | Applies a Strong Fertilizer every 900s |
 | Uncommon | 1.43x | Provides a 1.2x crop yield boost |
 | Uncommon | 1.4x | Provides a 1.2x sprinkler power boost |
 | Common | 1.22x | Applies a Normal Fertilizer every 900s |
 | Common | 1.22x | Provides a 1.1x seed luck boost |
 | TBA | TBA | TBA |
If you are early in the game and short on the rarer pets, lean on the cheap utility ones for a head start. Equip the Capybara while you are hunting for good seeds, since its seed luck boost raises your odds of pulling a strong crop. Once you have a high-value seed planted, swap the Capybara out for a higher-earning pet so your money multiplier does the heavy lifting at harvest.