Build a Zoo Update 40 Guide – New Features, Codes, Pets, and More

Update 40 brings one of the biggest content drops for Build a Zoo, packed with discounts, new conveyors, new pets, and several system improvements. Whether you’re farming pets, upgrading your zoo, or just logging in for freebies, this update has something for every player. Here’s a full breakdown of everything included in UPD40 so you don’t miss any of the new additions.

This new update adds several quality-of-life changes and exciting new content, making it a great time to jump back into Build a Zoo. From a huge Black Friday discount to new conveyors and eggs, players now have more ways to expand their zoo and hatch rare pets. This guide covers every new feature in Update 40 so you can take advantage of everything right away.

Black Friday Super Discount

• For seven days, all Game Passes and shop gifts are available at 50% off.
• If you’ve been waiting to buy boosts or upgrades, this is the best time to do it.

Key points:

• 50% discount on Game Passes
• 50% discount on gifts
• Event runs for 1 full week

New Conveyor – Transcendent Conveyor

• A brand-new conveyor has been added for high-level players.

Transcendent Conveyor features:

• Higher hatch rates
• Exclusive new Mountain Pet
• Unlocks the Fluffy Egg and Rusty Pet

If you’re trying to build a strong late-game lineup, this conveyor is a must-use.

New Eggs & Pets

Two new egg lines are now available with unique pets to collect.

Mountain Egg & Pet

• Egg: Fluffy Egg
• Pet: Rusty
• Found in: Transcendent Conveyor

Ocean Egg & Pet

• Egg: Jellyfish Egg
• Pet: Twinkle
• Found in: Mushroom Bait

Players now have more options to expand their pet collection with visually unique and powerful creatures.

Diamond Shop Update

The Ocean Eggs have been added to the Diamond Shop.

You can now trade your diamonds directly for these eggs instead of depending on bait or conveyors.

New Pass Trial Feature

Players can now activate a 5-minute trial for most Game Passes.

This lets you:

• Test bonuses before you buy
• Try powerful boosts for a short time
• Experiment with different features

Useful if you’re unsure which pass fits your playstyle.

High-Level Conveyor Optimization

Hatching rare pets from high-level conveyors is now easier.

Changes include:

• Increased hatch chance for high-tier eggs
• Smoother conveyor function
• Better progression for late-game players

Big Pet & Fish Level Cap Increase

Level caps have been raised.

• Big Pets: Max level increased to 365
• Big Fish: Max level increased to 90

This gives players more room for progression, power scaling, and stat gains.

System Improvements

Update 40 also includes several backend adjustments and bug fixes.

• Better overall performance
• Auto Mode and Low Mode fixed
• New Setting: Hide Mutation Effects
• Switch between Image Display or Effect Display for weather mutations

This makes the game smoother for all players, especially those on lower-end devices.

Build a Zoo Codes?

• 9WC77XXCM5A
• E5GSDBK7ATX
• BLACKFRIDAY
• LandCompensation

Check out our Codes list Build a Zoo for more rewards!

Update 40 packs a lot of new content into Build a Zoo, from discounted Game Passes to new pets, eggs, and system upgrades. With improved conveyors, higher level caps, and new trial features, now is a great time to jump in and grow your zoo even further. Make sure to take advantage of the limited Black Friday discounts before they’re gone.