Feasting on seeds, grains and fruit, Field Mice often aggravate farmers when they infiltrate grain silos and storage bins. These rodents are well-known carriers of the deadly Hantavirus which has caused numerous deaths in the United States. As prolific breeders, they pose serious health risks for humans and pets.
Another indication that mice are present is a strong musty odor. Cats and dogs may excitedly sniff and probe an area where rats or mice are present, and often indicate this by scratching or making unusual sounds.