Pure formula-fed babies, stools are light yellow or gray-yellow, dry and thick, more likely to be constipated, neutral or alkaline, PH value 6-8. cow’s milk contains more protein, stools have a distinct odor of protein breakdown products, can be mixed with white casein clots. Normal bowel movements are 1-2 times/day. If it is just that the baby’s bowel movements are at intervals of >48h, the bowel movements are not laborious, the expression is not painful, and there is no discomfort, it should not be called constipation. Mixed feeding babies, human milk plus cow’s milk feeding babies, the feces are similar to those fed with cow’s milk alone, but softer and more yellow. The stools of babies fed complementary foods are similar in appearance to those of adults. The addition of starchy foods can increase the stools, reduce their consistency slightly, make them dark brown and increase the odor, and the addition of pureed vegetables often results in a small amount of green stools being passed. Mixed feeding baby’s stool frequency is mostly 1 time/day.