Unfortunately, a dog that is believed to have eaten a human corpse will be euthanized.

So, best not, for all involved.

It's not really. Too often we anthropomorphizing out pets and even if they are not that different from us on the social-emotional level you cant blame for doing this - they have no concept of moral wrong of doing it. Historically, consider some human cultures not that long ago where cannibalizing your close ones was a honorable way to show them admiration (and also get the prion disease).