Mob Grow Up Tweaks
by Erath
Mob Grow Up Tweaks lets a server owner change how long mobs stay in their baby form, with separate timers for bred animals and for animals that spawn in the wild.
What it does
The mod sets the time a baby mob takes to grow up. Its defaults extend the baby stage: bred animals take 80 minutes and spawned animals in the wild take 30 minutes. A third value covers animals that spawn in the wild as a group and are not bred, and the configuration sets all of them, so a world can keep its young mobs for longer or shorter periods.
Because the timers are set in the configuration, the mod suits survival servers that want farms or pets to stay small for longer, and servers that want the opposite. It is a Fabric mod for Minecraft 1.21.1 only. The code is open source under the MIT License, and the source code and issue tracker are public. The mod was first published on 2025-07-31 and last updated on 2025-11-02, and the latest Fabric file is 1.1.0 for 1.21.1.
Key features
Bred animal growth timer
Sets how many minutes a bred animal stays a baby before it grows up, with a default of 80 minutes.
Wild animal growth timer
Sets a separate timer for spawned animals in the wild, with a default of 30 minutes.
Adjustable baby stage
Each timer can be changed in the configuration, so a server can lengthen or shorten the baby period of mobs.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Longer farm pets
A server can keep bred animals small for longer, which suits players who enjoy raising animals from babies.
Faster growth
Setting the timers lower brings mobs to adult size sooner, for players who find baby mobs slow to grow.
Who it’s for: Survival server owners who want to control how long baby mobs stay small. Players join without installing the mod, since the server runs it alone.
How it compares
More Animals is server-side only, open source under the CC0 1.0 Universal license and published for 1.21 – 1.21.1, so it adds animals rather than changing growth. Wild Behavior is server-side only and not open source, released under All rights reserved for 26.2, a different version. Fleeing Animals is server-side only and open source under the GNU General Public License v3.0 or later, covering 1.18 – 26.2 and focused on animal behavior.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Mob Grow Up Tweaks | Fabric | 1.21.1 | Not published | 2025-11-02 |
| More Animals | Fabric | 1.21 – 1.21.1 | Server-side only | 2025-10-10 |
| Wild Behavior | Fabric | 26.2 | Server-side only | 2026-08-14 |
| Fleeing Animals | Fabric | 1.18 – 26.2 | Server-side only | 2026-07-31 |
Questions
Does Mob Grow Up Tweaks need to be installed on the client?
Which loader does Mob Grow Up Tweaks use?
Does Mob Grow Up Tweaks support versions other than 1.21.1?
In the catalog
Mob Grow Up Tweaks is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from Erath
Similar mods
What the author says
Customize how quickly mobs grow up. You can change in ticks how fast villagers, wild and bred animals grow up. The default settings will increase the time those mobs stay in their baby form.
Official listing
- Modrinth page
- modrinth.com/mod/mobgrowuptweaks
- Owner
- Erath
- Published
- 2025-07-31
- Updated on Modrinth
- 2025-11-02
- Facts verified
- 2026-10-15