my baby cut his first teeth at 6 months. Before that, for a whole month, he refused milk, fuss at night, and drool a lot. He also started chewing on anything he could get to - that include both his feet and my arms. Sometimes the poo would seem a bit watery, sometimes yellowish. We could stand the sleepless nights but not the hunger strike.. later we discovered that he was more willing to take his milk when it's cooled down so we made the milk luke warm. After he had his two front teeth, everything went back to normal... for a week, and then the teething signs all come back again. We are now back to the wakings at night routine.