My 5 week old is nursing like a champ, and is a mellow, happy baby save for some fussiness at the "witching hour" between 5-7pm. He is growing like crazy:
Birth: 8lbs 15oz
Lowest: 8 lbs 12oz
3 day: 8 lbs 15 oz
3 week: 10 lbs 4 oz.
Two or three times in the last few weeks, he's had some blood/mucous in his diaper. Most of the time he has yellow, liquid/seedy stools, but once or twice a day things will be more green, but never dark or neon, just more green than mustardy. He's probably had blood in his stools 3-4x in the last 2 weeks. Relatively small amount; definitely looks like colitis rather than bright blood like a fissure.
I think I have some degree of over supply, but I haven't been really curbing it that much because I'm back at work and don't mind pumping extra. For instance, last night he fed at 2 and 4:30, 7AM and 7:45 and I still felt really full when I left for work. I pumped at 8:30 and got 6 oz total in about 7 minutes when I stopped the pump. I usually feel pretty full after about 2 hours if we are apart, because that's how often he feeds.
Also, I love my dairy. I drink 8-10 oz of milk/day plus other dairy products. My older DS had some issues with cow milk; not when I was breast feeding but in his second year of life he'd get burpy and smell like cheese when he drank it, so he drank goat milk and did fine.
I'm giving all this background because I think that either oversupply or dairy intolerance could be leading to this. I'm going to see his doctor about it, but what would you do? Try to get the oversupply into check (which is relatively mild) or eliminate dairy? I'm thinking dairy first, then oversupply, then other elimination stuff (I eat very little soy, etc). But I'd love to hear other's thoughts.
He's a mellow, happy baby who is not bothered at all by this, and the actual volume of blood isn't that much (maybe a quarter sized, thin pinkish reddish stain?).