Meconium: Black, tarry poops - Usually seen between 0 and 48 hours old. Totally normal. This is the first poops baby goats will have. They are extremely sticky and get all over everything. They are (mercifully) odorless.
Yellow, watery scours - Usually seen between 1 and 14 days old. Not normal. Watery diarrhea is caused by too much milk per feeding or milk replacer. To cure, lower the amount of milk per feeding until the scours stop. Or change the type of milk replacer. Baby goats do best on replacer made for goats, not "all stock" or cow replacer. NO medication necessary.
Yellow, pudding poops - Usually seen between 1 and 14 days old. Totally normal. Since young babies are on a diet of pure milk, their poops will be yellow in color and the consistency of thick pudding. Be sure to clean the anal area of dried poop so not to cause blockage. This stuff is very sticky and smells like soured milk (probably because it is soured milk!).
Brown berries - Usually seen at 2-4 weeks old or older. Normal. Yay! You made it! Miniature brown berries are the endpoint of a long road to adult goat pooping.