1 month isn't 2 soon my daughter was constipated at 1 month an that's what Dr recommend. All you have to do is give it to the baby twice a week. That's why its only one ounce of it. If u bottle feed it could be causing the constipation. Breastfeeding has way more nutrition and helps with Babys body system. Hope all works for you an the baby.
Is he bottle fed or breast fed? 1 month is very early to be trying juices and prunes etc... Maybe a different formula? Allergies or intolerances can cause constipation.
My daughter was breastfed but was getting constipated. I was on antibiotics when she was born and turns out this gave her a digestive imbalance of bad bacteria vs good. A month on SB probiotics doses then a month of baby probiotics fixed it all up.
Don't laugh but if you put like a tablespoon of dark kayro syrup in their bottle it helps a ton. Did it with my daughter when she was an infant and worked like a charm! It's an old remedy.
Go N buy Phillips that's good for a baby when she's /he's constipated
Take 1/2 ounce prune juice 1/2 ounce water shake it works magic. My daughter had the same issue of pear juice.
Try a few sips of baby water. I wouldn't recommend juices yet. You could try a bath and doing a tummy massage, or doing the bicycle with his legs. You could also try stimulating with a rectal thermometer.
Try orange juice that should help .. Apple juice might make him worse . what also helped my daughter was to give her a spoon full of olive oil what you do is cut some onion and put it to fry in the olive oil and then when the onion starts turning a little dark take them out and let the olive oil cool down and then give. That to your baby but seens his just a month old I recommend to just give him about a teaspoon