Puppy teeth are much smaller than adult teeth, and literally more needle-like. There are more likely to be gaps between the milk teeth as the dog is growing and so the teeth spread out. The crowns are often bright white, and semi-translucent with a hint of pink beneath the enamel. This is because the teeth are so small you can glimpse the living pulp through the crown. Adult teeth are generally more chunky and rounded, and the enamel starts out white but often ages to a creamy color.