Have you tried to spawn beasts from things other than wood/ponds etc. Carrots and spicy peppers have given me an army of fangbeasts and I regularly get them from pigs too. Nothing else seems to work, none around cows, chickens or farmhouses. Skunks are nonexistant in my kingdom smash some rocks, check your flowers, find where they're hiding. I hope you get a beast invasion after you encounter the next one so you can finish your base cider crafts!