Herd Hysteria

Hurt one member of the herd and watch the whole flock lose it.

In vanilla Minecraft, livestock couldn't care less when their neighbor gets bonked. That cow three blocks away? Totally unbothered. Herd Hysteria fixes that by giving your animals a healthy collective fear response – because nothing says "survival instinct" like fleeing in a group.

How It Works

When any herd animal (cross-species) takes damage, every nearby member within 20 blocks panics and runs from the attacker. No new AI goals, no performance-heavy pathfinding rework – just a clean mixin that tells the herd who hurt them so their existing flee behavior kicks in.

The Herd

Herd Hysteria applies to the herd_hysteria:food_animals entity tag, which includes:

• Cow
• Mooshroom
• Pig
• Sheep
• Chicken
• Rabbit

The tag is data-driven, so pack authors can add or remove entity types with a datapack.

Supported Versions

Herd Hysteria is a Fabric-only mod. Separate JARs are provided for each supported version:

Setup

1. Install Fabric Loader and Fabric API for your Minecraft version.
2. Download the Herd Hysteria JAR that matches your version.
3. Drop it into your mods/ folder.
4. Launch the game – no config needed.

Compatibility

• Server-side only – the mod works on dedicated servers and in singleplayer. Clients connecting to a server with Herd Hysteria do not need it installed.
• No known conflicts with other mods. The mod uses a single mixin on the actuallyHurt / hurtServer method and does not replace any vanilla AI goals.

Dependencies

This mod requires Fabric API (Fabric loader).

A LOREal Mod