Leader of the Pack

You walk through the kitchen, arrive at the back door and open it. Looking up, you see the full moon illuminate the night sky. You return your gaze downwards towards your barn, roughly fifty metres away; at present, it looks peaceful enough.

Beyond the rear of your property, about two-hundred metres from your house, is an adjoining forest. It is here where you suspect that the howling emanated from. Right now, though, you cannot hear anything.