Ereth teaching himself to smile in order to mourn Poppy's apparent death is oddly funny, heartwarming, and tear jerking all at once.
Brian Floca's illustration of Ereth drawing the corners of his mouth back with his paws sells it.
Ereth's rants in general.
Mr. Ocax's fabricated claims about porcupines being bloodthirsty killers of mice, and Poppy's later discovery to the contrary.
When he overhears a trapper claiming to be "hungry enough to eat a porcupine", Ereth eats his way through an axe handle and fills a snowmobile seat with quills. When the trappers discover his doing one jokingly suggests to the first that a porcupine might have heard his earlier remark and taken revenge.