MIL phoned me last Friday to tell me her grandson(who is in her care) had black diarrhea.She took him to the hospital and they ran some blood tests.Stool was tested for blood but all clear. They told her to keep an eye on him if any change.He had not passed anything since last Friday and she called me tonight to tell me he had finally gone. A week or so ago she contacted Dh to say they had no food(no money). Today we bought some food and the child had a good meal.(We saw to that). I was wondering if it wasn't constipation and rather the fact they he had not eaten.He has lost some weight and he and his sister are quite thin(since last I saw them) which was about 4 weeks ago prior today.She is waiting on blood test results. We are concerned for him and his sister.