Haggis?
A strange beast indeed… the offal truth is, haggis is actually a foodstuff concocted of a sheep’s stomach filled with that same (or a different) sheep’s liver, heart, and lungs, as well as oatmeal, suet, stock, onions, and spices.
Why is it illegal to import haggis from the UK?
In 1971 it became illegal to import haggis into the US from the UK due to a ban on food containing sheep lung, which constitutes 10–15% of the traditional recipe. The ban encompasses all lungs, as fluids such as stomach acid and phlegm may enter the lung during slaughter.