Juvenile Preserve
by LitQA
Juvenile Preserve lets players freeze a baby mob in its young form for good, using a Poisonrot Potato that is crafted from three ingredients.
What it does
A baby mob normally grows up on its own over time. Feeding it a Poisonrot Potato locks its growth, so it stays in the baby form permanently and will not mature naturally. The item is made from Rotten Flesh, Poisonous Potato and Pufferfish, and the process takes only two steps.
The mod covers vanilla animals such as cows and pigs, along with modded mobs that have a baby form. Other mods can add their own entities to the same behavior through a tag, so mobs from those mods can be preserved in the same way. Juvenile Preserve is published for Forge and NeoForge, with files for 1.18.2 – 26.3, and the code is released under the MIT License without being open source.
The server and every player need the mod installed. The latest files are 1.2.1 for 1.20.1 on Forge and 1.2.5 for 26.3 on NeoForge.
Key features
Permanent baby form
A fed baby mob keeps its current appearance and size, so it does not grow into an adult.
Poisonrot Potato
The lock item is crafted from Rotten Flesh, Poisonous Potato and Pufferfish, and it is used only on baby mobs.
Tag-based expansion
A tag named juv_preserve:dwarfedable lets other mods add entities that can be locked in their baby form.
Vanilla and modded mobs
Animals such as cows and pigs are covered, as are custom mobs from other mods that have a baby stage.
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x9 of 9 versions with builds
1.20.x4 of 4 versions with builds
1.19.x2 of 2 versions with builds
1.18.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Keeping a farm small
A player who wants compact livestock can feed each baby animal once so the herd does not grow into adults that take more space.
Pet-sized companions
Players who raised a baby mob and want it to stay small can lock its growth and keep its young look.
Who it’s for: Players who keep animals or raise baby mobs and want them to stay young, and server owners who want the same growth control for their players. Modpack authors can add their own entities through the tag.
Questions
Does Juvenile Preserve need to be installed on the server?
Which loaders does Juvenile Preserve support?
How can another mod make its mobs work with Juvenile Preserve?
In the catalog
Juvenile Preserve is one of 11,058 Mobs mods on ModsFinder, and one of 6,527 Mobs mods for Forge. 8,071 mods support Minecraft 26.3.
More from LitQA
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What the author says
Upset of your carefully raised baby mobs losing their adorable appearance as they grow up? This mod lets juvenile mobs (like cows, pigs and even custom mobs from other mods) stay in their tiny form permanently with a simple process. First, Craft the Key Item -- Poisonrot Potato: Rotten Flesh ×2 + Poisonous Potato ×1…
Official listing
- Modrinth page
- modrinth.com/mod/juvenile-preserve
- Owner
- LitQA
- Published
- 2025-09-09
- Updated on Modrinth
- 2026-09-27
- Facts verified
- 2026-10-15