My DS had an extremely small amount of blood in his stool a couple of weeks ago. The doctor said it could be a milk allergy if it happens regularly (he did have a little crack on his anus that the doctor thought might be due to him straining to poop). It didn't happen again until this evening. It seems to occur on his fussy days, when he is bf often (sucking because of a tummy ache?) and pooping often too.(sometimes slight green due to too much formilk). I did have a lot of onions in the last few days, as well as shrimp, which I also had two weeks ago. Could it just be something I ate? I eat milk products on a regular basis and it doesn't seem to have been a problem. He is a gassy fellow, at times he seems constipated, spits up a lot, but is a great sleeper and not overly fussy during the day (except when fighting sleep). What do you think?