Mad dog

There is a mad dog loose in the house
Quick! Lock it in that room!

What, you miss that room already?
Its pleasant aspects, its comfy chairs?

A more serious case is this:
Fire! Fire! Slam the door!

Now surely the flames will consume the room and the house
Soon the whole neighbourhood will throw up their arms.

The meaning is this:
Treat puppies well – they are adorable creatures;
Extinguish fires while they are still small
Your home is your heart.