You have probably never seen one, but this cat-sized member of the weasel tribe is not rare in New England woodlands. While famous for living on porcupines and squirrels, Fishers will eat anything they can catch (but they do not eat fish).
Yes, they like to eat house cats and poultry too.
In Massachusetts,
"Due to its alert, secretive nature and solitary habits, most people have never seen this interesting predator. It disappeared from the state by the 19th Century due to agricultural land clearing. Fishers have since made an amazing comeback, and now live in populated areas that offer mature forest habitat and the squirrels it preys on."
More about Fishers.
Video of Fisher hunting Porcupines