» Mon Jun 18, 2012 9:29 pm
Most rabbits are spawned from a two leveled lists (you can find them under the Actors tab under 'leveled actors'), And they are something like 'LvlAmbientCreatures' and 'LvlAmbientCreaturesSnow'. Each have about three rabbit and two fox NPCs listed in them. So, there is a 3/5 chance a rabbit will spawn and a 2/5 chance a fox will spawn.
If you add your rabbits to these lists, then they will appear in the game. However, if you want them to spawn at an equal rate, you'll need to add three to each leveled list, and one or two foxes per your three to keep a roughly equal spawn rate (as there are 1.5 foxes per 3 rabbits).
Hope that makes sense!