Yeah... it's a myth that foxes attack cats. They are neither big enough or tough enough. Coyotes... totally different story. They do bad things to cats and small dogs. But foxes and cats live together fine... if tenuously...T
This is our yard cat, she adopted us about a year ago.
Sometimes I'll set up the game camera in the back yard to see what comes through. One time it caught a red fox walking along, then all of a sudden he stops and his ears go up and he turns around and bolts. Here she comes, right on his ass chasing him out of "her" yard.
Things that attack cats: Coyotes, feral dogs, Fishers, raccoons, eagles... lots of things. But foxes, not so much. A healthy New England cat will stomp all over a fox!
Cheers,
Sirhr