Gregory's Server#Roy has been giving me a lot of slow blinks over past days. And yes he uses squint to pretend his eyes are closed method but unfortunately for him his tuxedo coloring includes "eyeliner" that makes it fairly easy to see when he's actually sleeping (you see mostly white) and when he's pretending to (eyeliner visible). I'm assuming he senses something is up and he's probably right.
Tuxedo is not a breed but a genetic mutation that stops colors spreading across coat.