Don’t worry: it’s normal to see a sticky black tar in there in her first days of life. The good news: this waste, called meconium, is odorless. As she starts to eat, you’ll notice that her poop color changes, from black to dark green to yellow. If you breastfeed her, it may be lighter in color, runny, and seedy looking, while formula-fed babies may make thicker, yellowish-brown stools. When she starts to eat solids, the poop will get firmer (and stinkier).