Cloned kitty
"...a week later they both strolled back, or should I say all three, as a new kitten was in tow - such an exact duplicate of Felix the owners could not tell them apart."
-Merovign , Dark Lord of the Sith
Hmmmm, indeed. Sounds like the two kitties had to go out and do a rescue of the third.
Or a cloning.
Mmmmmmmmmmmm