"Everyone" can reasonably be understood to only apply to "people/animals like those present here"

If we're pedantic on the phrasing, the wolf could have already satisfied the demand by keeping a meat-based diet that simply excluded hedgehogs. Then he wouldn't eat everyone, just those who aren't a hedgehog. But the spirit of the complaint was clearly "everyone here is running away because they are personally afraid of being eaten". Which only included mammals and maybe some birds