Aptamil Comfort. How long to use?

[HumeSnowdon]

I have a 15 day old who has had a bout of colic so we changed her to Aptamil Comfort formula which worked a treat.
But, now she has 1 or 2 very large loose smelly poos a day. Should I be changing her back to normal Aptamil?

sounds normal for a 15 day old really. But I’d change back to the normal none the less.