Talk to your pediatrician and see if you can give the baby Latulose and the dosage? I think it was 1ml-2.5 ml per day for baby.
-chestnuttree(Chestnut);
2017-12-15{301}(#11241789@0)
Adult could take 15 ml per day. You don't want your baby has a diarrhea either. My daughter's pediatrician recommended Lacutlose when she was a year and half old. She had constipation since she was a few weeks old. I tried things like you mentioned and none of them worked. Lactulose worked very well.
I tried Glycerin as well, but only she really had a hard time to pass stool. That will help to soften the stools
-chestnuttree(Chestnut);
2017-12-19(#11247544@0)