Requires Unity 4.3.3 or higher.
HerdSim is a simple and easy to use animal roaming simulator.
Simply drag the prefab to the stage and it will move within the roaming area. Instead of RigidBodies this system uses rays to avoid and push away from obstacles. This method is a lot friendlier to CPU usage and allows for a lot more instances.
Demo Page | Disabler Video
Features
? Drag & Drop roaming animal system
? No rigidbodies used – very CPU friendly
? Gizmos that shows roaming areas and herds
? Simple UV map, easy to change texture
? Easily use custom models (legacy animations)
? Works very well on mobile
? Mobile prefabs and materials included
? Both JS and C# scripts included
? Works on Unity Free and Pro
Includes
? 606 tris animated chicken model
? 1024x1024px texture/bump resolution
? 320 tris animated piggy model
? 2048x2048px texture/bump resolution
Demo Page | Disabler Video
Update +4
? 1216 and 598 tris cow model
? 2048x2048px texture/bump resolution
Cow Video