And something tells me that the squirrel both saw and heard the Someone in question......
The poor thing was having a potter around on the ground when captain calamity spotted it. A short chase ensued followed by lots of frantic running around the base of the tree and staring.
He chased one up a tree a few months back and I left him to mill around the bottom of the tree only to turn around and see him shinning up it. He was halfway up it before I pulled him down. It really made me laugh. I've never seen a dog climb a tree before. He's such a doofus.