This 7 Days to Die mod is an override mod for Rabbit of Caerbannog Mod in order to make it spawn “more frequently” in game, if you want the additional challenge.
It causes the rabbit to spawn anywhere animals can spawn (still a fairly low probibilty) and in some zombie groups. Highest spawn rate is in the Wasteland.
Required mod: Rabbit of Caerbannog Mod
The forum topic of the mod is here.