Mouse or Rat Droppings? How to Tell the Difference

Finding droppings is stressful, and what you do next depends on what left them. Size and shape are the quickest clues.

Mouse droppings

About a quarter inch long, dark, with pointed ends, like a grain of rice. Mice leave plenty of them scattered around, not in neat piles.

Rat droppings

Noticeably larger, about half an inch or more. Norway rat droppings are blunt and capsule-shaped, while roof rat droppings are more pointed and curved. They are often found in groups.

Other look-alikes

Cockroach droppings: Tiny, pepper-like specks, or small ridged cylinders from larger roaches.
Bat droppings: Crumble into dust and show shiny insect parts.

Fresh or old?

Fresh droppings are dark, shiny, and soft. Old ones are gray, dry, and crumbly. Fresh ones mean the pest is still active.

Why it matters

Either one keeps coming back until every entry point is found, and rats are a bigger problem than mice. Contact a professional as soon as you find droppings, and sooner if they look like rat droppings.

Clean up safely

Wear gloves and a mask. Never sweep or vacuum dry droppings. Wet them with disinfectant, wipe them up, dispose of everything, and wash your hands.