1, rat shit is bigger.

2, cockroaches have smaller stools.

Extended data:

Excrement, also known as stool, is the residue of human or animal large intestine discharge. A quarter of the feces is water, and the rest is mostly protein, inorganic substances, fat, undigested dietary fiber, dehydrated digestive juice residue, cells and dead bacteria falling off the intestine, vitamins K and B. ..

It is also called "shit", "poop" or "Baba" in dialects in most areas. For farmers, manure can be used as an organic fertilizer for better crops.

Baidu Encyclopedia: Feces