Jim Kjelgaard 
A Nose for Trouble [EPUB ebook] 

As they entered the clearing, Smoky growled softly and looked toward the cabin. Paying no attention, Tom walked up on the porch. He stopped in his tracks.

Somebody had been here since he left. Smoky’s growl should have given him warning of that.

Tom stared at the paper that was stuck in the door, pulled it out, and read it twice.

There’s enough people around here now. Get out within forty-eight hours or take what’s coming to you.

The signature was a drawing of a black elk!