A continuous cooking process is disclosed that mimics the U-shaped temperature-time profile produced by a batch kettle fried potato chip operation. Embodiments are disclosed of gravity andor spring assisted latching and tripping structures for releasably securing the trap door in the open position and responsive to an animal seeking to get to bait in the back of the cage. The order in which the data is read out is configured to match the expected rate matched output from a circular buffer. The swing lever has an elongated hole in which the second pivot shaft is inserted and a locating lug which is guided along the guide hole. The method can also include deriving, using the one or more processors, a service identifier from the source virtual port.