Lost Pit Bull Mix: Red Collar, 50 lbs, Scared

Female dog, with a red collar and possible green stripes. She appears to be a pit bull mix, around 50 lbs and may have recently had puppies. She is very scared and confused and NOT aggressive towards people or other dogs. Another neighbor and I tried to get closer to her and entice her with food and treats. She was last seen running down 3rd avenue towards 38th street.