The correct way to switch to a new milk powder: mix the two milk powders at the beginning, and then gradually replace them with the new milk powder in a step-by-step manner.
Whether you are switching from one brand of milk powder to another, or from one stage to another, you should mix the two kinds of milk powder at the beginning of changing milk powder. First, add 1/3 of the new milk powder to the previous milk powder.
After two or three days of eating this way, there is no discomfort, and then 1/2 of the old and 1/2 of the new formula will be eaten for two or three days. Then 1/3 of the old milk powder and 2/3 of the new milk powder for two or three days. Finally, the transition to completely replace the old milk powder with the new milk powder.
Changing milk powder needs to be gradual, do not be too anxious, the whole process is as little as 1 to 2 weeks, more than a month, to let the baby have the process of adaptation. Switching milk should be done when the baby is healthy, such as without diarrhea, fever, colds and other conditions.
If your baby is not feeling well, you need to consult a doctor promptly.