A building in Brooklyn is taking a scientific approach to keeping the sidewalks clean of dog droppings.

With close to 175 dogs in the luxury condominium complex at One Brooklyn Bridge Park, management is requiring tenants to submit samples of their pet's DNA.

If the feces left outside is their dog's, the resident has to pay a fine.

Dog owners who live in the building say that at first, some were angry that management was taking such a drastic approach to the situation. However, they say that months later it seems to be working, and building cleaners couldn't be happier.