I gave my LO drink NAN Optipro Ha 1, and he had a little bit of constipation and colic after drinking it. I change to Bellamy and everything just become better but Bellamy does not have DHA. So I mix breastfeeding sometime but he just love to drink Bellamy more than my breastmilk. Can I afternoon let him drink NAN and the rest of the day mix Bellamy and breastfeeding? Is it too many different taste?