Hi. I have a 55 day old son and was born with respiratory distress. However jus now had a doc checkup and he s completely fine now. They have asked us to do rop screening and ear test as he was in incubator for 24 hrs. I believe he s fine. Should i do that tests. Other question is my son was never content with breastfeeding. So i introduced nan pro1 when he was 6 weeks old. His growth is fne nw. His birthweight was 2.3 kgs and he s now 4.2 kgs. His stool is greenish yellow in color. Im also breastfeeding him periodically between formula feeds. Im finding Nan pro1 to b bit costly bcoz my son is having 5 feeds a day now. I also checked lactogen 1 in market. Can i alternatively use nan pro1 and lactogen together.