The Feline Bomb

A policeman found a box on the doorstep of the police station, abadoned & no markings on it. Being very security concious, he called in the bomb squad to carry out a controlled explosion & destroy the package. Upon examing the remains they find the bodies of 6 kittens & a note explaining that the owner had left them there after her cat had given birth as she couldn't afford to look after them.