Hi there. How did you ascertain that the stools were acidic ? Is there any excoriation which you have observed around the anal opening ? It is important to know this in order to rule out any intolerance to milk feeds. If breast milk is adequate there is no need to give any formula feeds to your baby.
At this stage it would be appropriate to get a stool test
done specifically for reducing substances. Also, proper weight recording along with assessment of dehydration
is required. Since it is possible only in a hospital setting, do not hesitate to show your baby to a Child Specialist.