We're trying to find the right formula for baby girl similac was to harsh isomil made her stool too hard she was pooping turds at only 4 weeks and this enfomil sensitive she's not drinking at all it's 5pm and she only had 1 bottle which took her awhile to drink that dunno what else to do her dr says it's trial and error but damn I don't think her little stomach can take that!
Did you try enfamil newborn? My baby wouldn't take anything but that one.
There's also similac sensitive, Gerber soothe, A soy formula. Etc. I had to try a bunch of different ones when my daughter was younger. Her pediatrician gave us like 4 cans to try. You can also get the small cans that are like 10-15 depending on the area. Sign up for as many formula sites as you can for free samples as well. It is trial and error. It took me trying 5 or 6 different formulas before I found one that worked well.
try soy formula