<Snipped quote by Hillan>
"an unopened, packaged hot dog can have Listeria bacteria that cause listeriosis, it is safer to heat them" - Wikipedia on American hot dogs
You don't have to heat ours to stay safe - our pre-cooked, jarred hot dogs are okay to eat both cold and hot. Also, if they're vacuum packed they're dry and nasty. Ewwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww.
Actually they're not, they put a little bit of juice in the vaccuum seal. Also, all hot dogs are pre-cooked, whether jarred or vacuum sealed.