I want to start by telling you guys that I have never had a pigeon before. The baby's parents were scared away by someone. I have been taking care of him for the past 2 days. I fed him ground up adult pigeon food mix, mixed with water. He was very interested in food, but since yesterday he's showing less and less interest. I noticed water dark green poop along with some white in it. I have no experience with birds. please help me to save him.