You depart in the morning.
The countryside is densly farmed for the first dozen miles, but toward afternoon the settlements become fewer. As evening draws nigh, and you begin to set up your camp for the night, you begin to hear an eerie sort of screaming howling rise up in the distance to the north. It is answered by a similar call to the west, also seeming very far away. Your animals seem very nervous, but not yet really alarmed. The howls do not seem to be growing closer or further away, but as the minutes drag by, they increase in frequency until you are certain they are being produced by at least three different animals, perhaps more. The howls are like nothing you have ever heard before.