Barking up the wrong tree

Went to visit Ma at the country estate on the weekend and as we left, we saw this koala bumbling along the roadside in search of a tree. It clambered over a fence and up this silver birch tree. Ooops. Nothing to eat here. Like a panda in a pine forest.
Squid went completely NUTS and wanted to claw through the car window to eat it. We drove off with her staring longingly out the back window at the tasty, eucalyptussy snack her cruel owners wouldn't let her have.