Worried Cows ©™® 

14 Worried Cows were walking forth & back
Until one remembered she left the gas open and they went to check.
As they approached the door of the house,
They saw a black cat chasing a mouse.
The smoke coloured cow opened the door of the room.
The others were worried outside when the cow went Boom!
They saw their friend's stomachs on the floor.
It was inside out and her brains were hanging on the door.
After 10 minutes the lungs of the cow falling from the sky they have seen,
How Unlucky! The cows were now 13!