Madison is a female Yellow Labrador Retriever who plays the role of Vincent (a male dog). Kim Stahl, Madison's trainer, oversees the dog during filming. Stahl made an appearance in a short video clip in TV Guide's August 27, 2006 Lost feature's extras CD. Madison hails from the Rygwood Labradors Organization. Madison was previously experienced in tracking and obedience competition, but this is her first appearance in television or film.
Madison has two daughters, Byrddee and Jane. [source needed]