Question: how do you know if you have a rat or a mouse?
Answer: Mice have thin, slightly hairy tails; rats have a thicker, hairless, scaly tail. The nose of a mouse is triangular in shape; the nose of a rat is more blunt and rounded. ... Mice droppings are approximately 1/4 inch long with pointed ends. Rat droppings are longer (3/4 inch) with blunt ends.