Critters don't have this though, and they still rely on their animations for playing sounds
Does this mean at a certain movement they are doing a howl? ;)
At least I couldn't confirm synchronisation yet. E.g. the Wolves don't give a howl exactly when the animation does.
As a quick solution you could perhaps manage they howl with a 50% probability or depending on a counter every second time. If I put more animals in, we might get a sound polution.