The fisher has a double-recording track, where its
hind feet directly land in those of its fores.
Also, the 3-4-3-4 track pattern of a fisher is pretty
typical of their loping gait. Size is right, and the 5 toes (notice one is
slightly ahead of the others in asymmetrical form)
eliminates many other mammals. A bobcat would have a
rounder track and more catlike gait.