Signs You've Got a Rodent Problem
Droppings are usually the first clue, rat droppings look like a large grain of rice, mice leave smaller, thinner ones. Scratching in walls or the loft, especially at night, is another common sign. Gnaw marks on skirting, wiring, or stored food, and a faint ammonia smell in enclosed spaces, round out the usual list. Squirrels tend to announce themselves more obviously, loud movement in the loft during the day, since they're active when rats and mice generally aren't.
