How much kayro syrup should i put in my one month old sons formula bottle to help him poop? it's been almost 4 days and he's fussy & uncomfortable

Infant constipation: If you child has not begun solid food it may be better to add sorbitol-containing juices ( apple. prune, pear) . For infants four months and older, two to four ounces of 100% juice per day is good starting dose. For infants who has begun solid foods, sorbitol-containing fruit purees (peas or prunes) can be used. Also multigrain or barley cereal can be substitute for rice cereal. Good luck !!!