Pets are one of the most underrated income levers in Build A Ring Farm. Alongside seeds, rings and mutations, the pets you equip stack their own earnings multiplier and passive abilities on top of every harvest — so the right companions can dramatically speed up your progression. There are 17 pets as of Update 4, spread across eight rarity tiers, and this community-reported tier list ranks which are worth chasing. (For where pets fit in the bigger picture, see how to make money fast.)
Heads up: Build A Ring Farm has no official pet stats page, so the rankings below are community-reported and cross-checked across guide sites. Treat them as strong leads, not gospel, and verify in-game before spending millions on eggs.
S-tier — the best pets
These are the companions that change the game, combining big earnings boosts with mutation-upgrade or farm-acceleration abilities:
- Starfall Griffin — a Divine, Update 4 pet that applies the unique Starfall mutation. Multiple guides, including Sportskeeda, call it the single best pet in the game.
- T-Rex — boosts mutation chance across your farm; players often equip several across multiple floors.
- Kitsune — the top reported pet for automatically upgrading crops toward higher mutations, which is exactly what late-game income needs.
- Hydra — a consistently top-ranked S-tier earner.
- Velociraptor — doesn’t raise crop value directly, but speeds up timers across the whole farm, which compounds into more harvests and more cash.
If your goal is maximum profit, these five are what to work toward.
A-tier — excellent value alternatives
You don’t need the rarest eggs to build a strong farm. According to several tier lists, Polar Bear, Gallimimus and Spinosaurus offer strong value without endgame rarity, and the Big / Giant Mammoth line is a great long-term pick from the Epic Egg for free-to-play grinders thanks to its mutation-upgrade focus.
Best beginner pet — Capybara
Early on, raw earnings matter less than getting better seeds, which is why Capybara is the standout starter pet: its Seed Luck bonus improves your seed rolls, and it hatches from the cheap Common Egg. Some tier lists rank Capybara low because it falls off in the late game, but for new players it is one of the most useful pets you can equip. Lion is another handy early pet for fertilizer uptime. Keep them until you can hatch stronger mutation pets, then replace them.
Starter and filler pets
The Common pets — Dog, Cat and Bunny — give modest 1.16×–1.25× earnings boosts and basic passives. The Uncommon Fox and Raccoon sit around 1.5×–1.75×. These are fine while you save coins, but don’t pour pet treats into levelling them; save those resources for Rare and Epic pets where the return is far higher.
How eggs and pet levels work
Pets come from eggs at the Egg Shop on the right side of the map. A standard Common Egg costs around $25M, and higher-rarity eggs cost significantly more or appear as Robux pet packs. Every pet can be levelled to 50, with earnings boosts and skill trigger rates rising each level — so according to Pro Game Guides and other guides, it is better to max one main pet than to spread upgrades across many. You can also equip duplicates of the same pet across different floors, which is why stacking several T-Rex pets to boost mutation chance farm-wide is a popular endgame move.
Pets vs seeds vs mutations — what to prioritise
Pets are powerful, but they’re a multiplier on top of a working farm — not a substitute for one. If you’re early, your money is better spent on keeping plots full, climbing seed tiers, and buying Saw and Sprinkler upgrades than on expensive eggs. Once your base loop is solid and you have spare cash, pets become one of the fastest ways to push your numbers higher, especially mutation-upgrade pets that work automatically. The rule of thumb: build the loop first, then layer pets on top.
Are pets worth buying with Robux?
Robux pet packs can guarantee a high-tier pet instead of gambling on egg hatches, which saves time — but they’re never required. Free-to-play players can hatch the same pets from the Egg Shop with in-game cash; it just takes longer. If you spend at all, a guaranteed S-tier pet like a mutation-upgrade companion gives more lasting value than cosmetic or one-off purchases, since a strong pet keeps boosting every harvest for the rest of your playthrough.
Pet slots, levels and stacking
You can equip a limited number of pets at once, with extra slots available via Robux, and you can place pets across different floors of your farm. Because you’re allowed duplicates, a common endgame trick is stacking several T-Rex pets to spread their mutation-chance boost across the whole farm. Every pet levels to 50, and both the earnings boost and the skill trigger rate rise as you level — so focus your pet treats on one main companion before spreading them around. Pair your best mutation pet with high-value crops on the Outer ring for the biggest effect.
How to use pets for maximum income
The strongest setup pairs mutation-upgrade pets (Kitsune, Mammoth, Starfall Griffin) with your highest-value crops on the Outer ring, so they push those crops toward Rainbow, Cosmic and other top mutations without waiting for rare weather windows. Use your remaining pet slots for raw earnings boosts. To see exactly how a pet multiplier changes your numbers, plug your setup into the calculator. And if you’re still building your base, the beginner’s guide covers the order to unlock everything.
Pets won’t carry a farm with empty plots and weak seeds — but layered on top of a solid loop, the right pets are one of the fastest ways to multiply your Build A Ring Farm income.