Fairfax County said it plans to be more aggressive in notifying communities of rabies cases.
Starting this Friday, animal control officers will go door to door to alert people when rabid animals are found so they can take precautions to protect their pets.
As of mid-August, 30 animals tested positive for rabies in Fairfax County in 2011. Last year, there were 50 rabid animals. Those animals included raccoons, skunks, foxes, bats and groundhogs.
Rabies vaccinations are required for cats and dogs in Fairfax County.