[1000100_1000101]

I remember a friend's cat following the mouse pointer on an Amiga with a CRT monitor. When moved off the bottom of the screen, the cat would go right up to the screen and try to peer down to see where it had gone.

Not sure about dogs, but cats definitely could see a plain 60Hz CRT display... atleast some of them anyway.

[broscillator]

Sure but a cat would probably have the same reaction if an arrow behaved like that irl, it's not the same as recognizing something as a living being due to how it moves.