Hollywood residents are combating their ever-expanding pigeon population by feeding them a birth-control drug.The birds have descended on Tinseltown over the past few months and an estimated 5,000 now live in the area.Residents are so fed-up with the dirty birds they are planning to use OvoControl P, a drug which interferes with egg development, to try and cut their numbers.Laura Dodson, president of the Argyle Civic Association, the group leading the new campaign, said: "We think we've got a good solution to a bad situation. The numbers of pigeons have become unmanageable." The population growth has been partly blamed on a woman known locally as the 'Bird Lady' who has dumped large bags of pigeon feed in dozens of areas.