Helpers
Infested Sleeper Wolf
Animal sleepers are very specific. They randomly 'use up' a spawn of the assigned group but the spawned animal type is exactly what you place.
Where to find (2 POIs)
Doggos (tier 2), The Animal Hoarder (tier 2).
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.