M.-
This happened to my little one when he was 3 months old, also (bright red blood in his stool; mostly specs, but sometimes as large as a grain of rice). He is currently 10 months old, thriving, and doing well. We have discovered at this point that it was due to allergies. Not only did I cut out dairy, but soy as well (there is a high incidence of children that are allergic to milk are also allergic to soy). Also high on the potential allergens list is egg, wheat, fish/shellfish, pine nuts, and tree nuts. I cut out everything in my diet (as he is still breastfed), and he did much better. We have him followed by a gastroenterologist to keep an eye on it. We are slowly adding some of the potential allergens to his diet and mine to rule out what specifically he is allergic to. So, needless to say, it's been difficult from a 'what to eat' perspective, but well worth it to figure out what's going on. And, he was/is always happy and wonderful, as well. It is not always indicitave if they are happy; they could still have allergies. I hope this helps a little, and feel free to contact me if you have any questions!