Are eggs regularly transported long distances in the USA? I don't think I've seen eggs from outside Denmark for sale in Denmark, though many other things (cheese, meat) are.
If people in Minnesota (same population) aren't regularly buying eggs from out of state, then the comparison with Denmark holds.
> I don't think I've seen eggs from outside Denmark for sale in Denmark,
That is because of the strict rules regarding salmonella. Danish chicken farmers will test for salmonella and kill any population of chicken found to have salmonella, leaving our eggs "guaranteed" free of salmonella. Any other country that wish to sell eggs in Denmark will need to be able to make the same guarantee. This is one of the few exceptions for the free movements of goods within the EU.
Sweden, Finland and Norway seem to have the same checks as Denmark [1] but we don't see their eggs for sale here either.
But from a quick search, it looks like I've happened only to live in egg-exporting countries within the EU, which explains why I've never seen it. Even so, whole eggs don't seem to be transported great distances — most imports and exports are liquid or dried egg.
If people in Minnesota (same population) aren't regularly buying eggs from out of state, then the comparison with Denmark holds.