Hello Barefoot, my 4 month old baby has only had breast milk so far but my mom said I should give him baby rice cereal in his milk to fill him up. I gave in and did this for a couple of days in a row, albeit a small amount, and now he's constipated. Only 1 bowel movement in 5 days. He is upset when feeding now and only takes small amounts at each feed before stopping and crying. He is passing wind a lot and seems to be in pain. Do you know of anything I can do to help him. Thanks for any advice, Samantha