Hi,
Thank you for all the replies.
I did decide to switch to the follow up formula. I use Isomil Soy Formula (as the doc, thinks he might have a milk allergy, which I disagree with, whole other topic) so the price between the to were the same.
I kinda feel bad now, I never knew you could mix the 2 formulas to gradually get him used to the new. I just kinda switched. I started it yesterday, everything seems ok so far
So much to learn
Again thank you so much,