my mom always had me put a tablespoon of clear karo in the bottle when the baby eats...it will loosen up.it worked every time with my kids....and it won't hurt the baby either.
you might need to change his formula. my oldest had an issue with Gerber formula making her poop hard. so we ending up switching her formula. I would call the doctors office and talk to the nurse and see what you can do so you dont have to wait until your appointment.
I gave my son water/juice mix, and he's perfectly fine :) the only problem I ever had was actually when I listened to his pedi & stopped doing juice and started doing Karo syrup. it made him more constipated than he was to start with. @kimberlyyyy @nini2015
Prune or Apple juice, pear juice works too. 1 oz of juice, 2 oz of water. or .5 oz of juice & 1.5 oz of water, depending on how much formula you give your baby.