# Seems mighty chummy with the dog all of a sudden.
# He actually *does* have your tongue.
# You find a stash of "Feline of Fortune" magazines behind the couch.
# Cyanide pawprints all over the house.
# You wake up to find a bird's head in your bed.
# As the wind blows over the grassy knoll in downtown Dallas, you get a faint whiff of catnip.
# Droppings in litter box spell out "REDRUM."
# Catch him with a new mohawk looking in the mirror saying, "Mew looking at me? Mew looking at me?"
# Takes attentive notes every time "Itchy and Scratchy" are on.
# You find blueprints for a Rube Goldgerg device that starts with a mouse chased into a hole and ends with flaming oil dumped on your bed.
# Has taken a sudden interest in the wood chipper.
# Instead of dead birds, leaves cartons of Marlboros on your doorstep.
# Ball of yarn playfully tied into a hangman's noose.
# You find a piece of paper labelled "MY WIL" which says "LEEV AWL 2 KAT."
# Now sharpens claws on your car's brake lines.