What is one sign of a rodent infestation?

One sign of a rodent infestation is the presence of droppings and gnaw marks. Rodents, such as mice and rats, tend to leave droppings in areas where they feed or travel. These droppings are small, dark pellets that can often be found near food sources, nests, or pathways they frequently use. Additionally, rodents have strong teeth that they use to gnaw on various materials, resulting in visible gnaw marks on furniture, wires, or walls. Detecting these signs can be critical for early intervention and effective pest control measures.

The other choices do not specifically indicate a rodent problem. Colorful markings on walls could indicate many things unrelated to rodents, while excessive dust accumulation might suggest neglect or other issues in cleanliness. Unusual pet behavior may hint at a pest presence but is generally not as direct or specific as observing droppings and gnaw marks, making it less reliable as a clear indicator of a rodent infestation.