Question: how do you know you have mice in your house?
Answer: Here are some common signs of mouse activity you can look for in your property. Droppings - Mice will excrete 50/ 80 droppings a night, small and dark (approx. 3 - 8 mm in length), scattered randomly, check inside or on cupboard tops or along floorboards. ... Scratching noises - Often at night when mice are most active.