BROOKLYN - The city's Department of Health and Mental Hygiene has rolled out a new online system that aims to help Brooklyn pet owners locate their missing pooches. The e-Dog locator system is free for pet owners who get their pets licensed or relicensed. When someone finds a missing dog, they're now able to forward their contact information to the owner through the health department's website.Dogs are legally required to be licensed in the city. Owners who do not license their dogs could be slapped with a $200 fine.