This would make a fantastic anime, Cal! Full marks for creativity here in giving us a beary great story. (I'm fighting off so many puns here.)
I'm loving that you took a different tack from the expected. The names of Shiro's companions are too cute (yes, even Grizz). Since they're bears, the uses of Nutella for the girl's eyes and the salmon flopping really help immerse us in their viewpoint. I have to admit to saying, "Aww!" when reading how comforted Shiro was by have his companions close by.
(Side note: How hilariously wrong is it that as this girl is at the mercy of these bears, everyone just stands around holding up their cell phones?)