@CCN: No need to worry about protein intake and renal function. There is no compelling clinical evidence of renal damage in healthy patients from protein consumption.
Here's a popular press article written by a Canadian PhD in nutritional biochemistry, John Berardi.
http://www.bodybuilding.com/fun/berardi80.htmThat's good to hear

I hope you're right. I tend to err on the side of caution, sometimes when it's not even warranted... (hmm, I think the anxiety counselor called that catastrophizing? lol).
Thanks

Being very thin isn't the worst thing in the world. I say that as someone who has been living with this for over a decade, with a child who weighed less than 20 lbs at a year old, and it got MUCH worse from there. Family history being what it is, we'll take that over Type II diabetes, thanks.
I also suspect that we've become (societally, I mean) conditioned to expect kids to be.... er... "plump." I'm not sure that this is physiologically intended by nature, or at least not for all children.
Same with my DD10 - she was less than 20 at 12 months. In fact, she was the last kid in her class to graduate from a full car seat to a booster (I think the law here is 40 lbs - I can't remember now) and holy SMOKES was that an issue (for her... she was maaaad).
I also agree with you about the plump factor - I think North American society is normalizing excess weight (i.e. obese is now the new overweight, and overweight is now the new normal).
I've had comments about DD10 when she was younger... "oh she's so thin." DH and I were both very skinny when we were young, so part of it is genetics and part of it is her food sensory issues.
No significant food intolerances at this point (phew) although she is reactive to pollen, grass, trees and cats (eyes swell shut, hives everywhere, eyes and nose start running, gets a long lasting cough and chest congestion, sometimes wheezy, chest pain...) sigh. It broke my heart recently... we may have discovered a food sensitivity: she LOVES avocados (so healthy!!) but I won't let her eat them anymore because whenever she does now her tongue gets really itchy. That makes me a bit nervous.
Anyway, they're BOTH scrawny (DD AND DS). Their height is normal though. Scrawny & fussy...