This happens way too often but shotgun ammo is expensive and not very effective

Thank you for making me curious about the realization I wasn’t aware of a “silver bullet” for Wendigos. Silver comes up, but it seems fire is a more commonly accepted weakness - whether simply chucking a molotov or tricking it into eating salt, which apparently causes it to hack up its still beating heart, which must then be burned (feels overkill but better safe than sorry)

Oh, or just feeding it and treating it like a person, since its origins are a myth warning against cannibalism. Bear tallow is a supposed inoculation, which makes sense given eating animal fat would provide quick nutrition.

TL;DR burn that sucker.

could be shizo or poisoning

If your shotgun ammo isn't very effective, you're getting the wrong ammo. A 12 gauge slug will easily go through an inch thick reinforced glass.

Don't ask how I know that, but a few CRT televisions were sacrificed, for science!