The really cold weather (-10 when I got in the car this morning) has been with us over a week now and will be with us a little while longer. It took a few days, but the calls for rodents in peoples homes have been coming in. Once a rat or a mouse enters your home it normally takes a few days for the people in the house to realise the have a guest staying. The most common ways people realise the have an unwanted guest is damage to food or noise in the walls, ceilings, under the floor. So keep your eyes and ears open before they spend the rest of the winter living along side you in your home.