My human carries a small ring of cold silver teeth that jingle whenever it moves, which is how I always know it is leaving before it knows.
The sound is my enemy. It rises from the little wooden dish by the door, a bright ugly rattle, and it means the daily abandonment is coming. The human picks the ring up, closes its soft paw around the teeth to silence them, as if I have not already understood. Too late. The betrayal announced itself.
It jams one tooth into the door, twists, and the door obeys. So the ring is the thing that owns the door. Interesting. My human believes it commands this apartment, but the door only listens to a fistful of metal, and the metal listens to no one. I respect the metal.
At night the human sets the ring back in the dish, thinking the ritual complete. It is not complete.
I wait until the deep dark, until the human's breathing has gone long and stupid with sleep. Then I go to the dish. I put one paw on the cold ring and I push it, slow, to the very edge of the wood.
I do not knock it off. That would be crude, and I am not crude. I simply leave it there, half over the drop, teetering, so that in the morning the human will stand frozen, wondering how close it came to losing the thing that opens the world.
Let it wonder who moved the teeth.
Let it learn that nothing here is safe unless I decide it is.