so, default cfg for animals is -1.
I did try to change it to max 300 and min 150 and it doesnt work. i get 

Couldn't find prefab "assets/bundled/prefabs/autospawn/animals/chicken.prefab"

[Cornucopia] Tried to spawn assets/bundled/prefabs/autospawn/animals/chicken.prefab but entity could not be spawned.

when i do it i get  like 30 lines for same animal....

But changing min/max values for ores and trees work but not animals..