Jeff Sindelar wears a shirt with the word SPAM printed on it. To him, SPAM is more than junk email. Sindelar, an assistant professor in the UW-Madison meat sciences department and a UW-Extension meat specialist, has the whopping challenge of convincing the public that processed meats are not the devils of the deli section. That means sending the message that hot dogs, the most notorious of all, don?t contain hooves and beaks and anything else wiener makers care to throw in the vat at the factory.