Crossed kittens

Annie & Kiki asleep on my chair with Kiki draped over Annie earlier today after an exciting morning of playing "The Great Escape"
I turned my back for a minute n the pair of them disappeared over a neighbours fence for a good 20 Mins..... Sending me in to a mad flat panic..... They are vaccinated but not spayed yet n the last thing I want is more babies especially when they are still babies themselves..... N I can't get them "done" til end of October "