Deb, I agree with all your parameters.  

I would modify the one on temp -- a dehydrated baby may indeed feel hot.  But I have also seen babies with very low temps (95.8 - 97.) that came up when they were finally fed.

I would also add a parameter of skin color.Since yellowing skin indicates rising bili levels, and 
since bili levels go up with hemoconcentration, and 
since hemoconcentration increases with dehydration, 
maybe visible early jaundice could be related to dehydration rather than blood incompatabilities.

In earlier discussions on Lactnet, beginning of '97, there was a lot of talk about the different types of jaundice.  And it was pointed out that much of it was due not to the breast milk itself, but the fact that there is not much quantity at first.  So it stands to reason, to me, that dehydration, which comes from even a greater lack of quantity, would produce more jaundice.

Sincerely,  Chanita