Whether inside or outside, rodents should be controlled as soon as they are seen. The main concern is disease and filth associated with their presence. It is recommended you call immediately for an inspection.
Rats are most often first spotted outside where they are attracted by bird feeders or garbage. Control outside is much more affordable and preferred. Once inside, control becomes very difficult and time consuming. Cylinder-shaped droppings are a first sign of an infestation.
The field mouse and the deer mouse are the most common complaint. While control in homes is simpler than with rats, it needs to be done properly and thoroughly. In homes, the tear-shaped droppings are the first indication of an infestation.