Just in case you don't want to read the whole article...here's a small part.
"On the windowsill of the sugarhouse are small clear bottles filled with syrup, each a different shade of copper. At the end of the line is a bottle of ketchup. "The guys like to throw hot dogs into the vat and boil them up to keep themselves going," Shelley explains. More often than not, the boiling goes on throughout the night. "Sap is not like whiskey," Robert Howrigan says. "It does not improve with age. You've got to boil it right away and make way for the next day's crop." A sweet hot dog goes a long way in the middle of the night."