My son is 6 months old and recently started solid foods. His stool went from loose to mushy and hard, and he d usually have 3 bm/day. But as of last Saturday, my son s bm are very frequent and loose. The color was first yellowish/mustard like and now it changed to greenish, and it s even more frequent (with every feeding). On Saturday, we introduced apple puree and i thought that maybe it was just a reaction to it. So, as of Sunday he is only having rice cereal 1/day and the rest of the time I breast feed, but that did not make a difference. His bms became more frequent and color did change as well.Should I be concerned? There are no other symptoms (no fever, no changes in his behavior, sleeping_