Answer:
What does a cat have that no other animal has?
He is not the skinniest of felines.
A close relative of ketchup that people often spread on their dog.
A mysterious, fantastic creature, It has one defining feature, And for humans at their worst, In their eyes it's just a horse
The strangest creature you'll ever find: Two eyes in front and many many more behind.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.