Fern's the same age, and while she doesn't poop quite that much she will sometimes go 4 - 5 times in a day, and I get all kinds, ranging from watery to peanut buttery, it often seems to depend on how much nursing she does in a day, when she does a lot, and little solids, I still get breast-fed baby looking poops. And yeah, I get lots of foods coming out like they went in (esp. spinach, carrots, papaya (that one was briefly scary, blood red poops!!)).
As long as he's nursing lots I wouldn't worry about the nutrients, at least the bm he'll digest fine. I think rashes are often linked with acidy foods (citrus, tomato, pineapple etc).
btw, if you want to break dairy's alibi
, try a diary of what he eats and how the poops look after a few days you should be able to get an idea.
The worst thing about solids poop, IMO is the smell!
Yeah, who though, a year ago, that we'd be sitting here chatting about poop in depth :LOL