ROCKVILLE CENTRE - An apartment complex in Rockville Centre is considering harnessing the science of DNA to track down dogs living in the building that do their business on the lawn.The management of the new Avalon Bay rental building says it has ordered four "Poo-Print" DNA kits from a Tennessee company to try them out before possibly adopting the DNA testing method in the building. As part of the testing process, if a groundskeeper finds dog feces in a common area, he or she would take a sample of it, put it in a test tube and mail it to a lab in Tennessee for DNA analysis. If the Avalon Bay complex adopts DNA testing as its policy, all the residents in the building would have to submit their pet's DNA so there would be a database to compare it to. Many people, however, have expressed reservations about the plan."The money is wasted doing that," says Dan Mooney, of Massapequa. An Avalon Bay spokesman says it is still months away from making a decision on whether to use the "Poo-Print" technology.