Manchester Pest Control · Pest Advice Blog
How to Tell the Difference Between Rats and Mice in Your Property
Published · 4 min read · Certified Technician Guide
Brown rats require larger entry points and leave noticeable dark grease smears.
Discover the critical differences between rat and mouse droppings, noises, behaviour and ingress points to take the right action quickly.
Frequently Asked Questions
How do I tell if droppings belong to a rat or a mouse?
Brown rat droppings are 10–14mm long with rounded or blunt ends, while mouse droppings are tiny 3–7mm pointed grains shaped like black rice.
Can rats and mice infest the same property simultaneously?
It is very unusual for both to occupy the same space because rats actively predate upon mice. Identifying one species usually confirms the primary target.
What size hole can a rat or mouse squeeze through?
Mice can slip through gaps as narrow as 6mm (the width of a pencil), whereas young rats need around 15mm and adult rats need approximately 20mm.