On intake and output - Diaper weighing

I assumed this information would be easy to find, but I find myself posting the question here. Hopefully, somebody here has been down this road and can offer some data and or advice!We have a 7 month old who is low on the growth curves and dropping. He's not yet taken to solids (we're offering, but he's not really interested in eating it seems). For breastmilk, he only eats in some locations because normally he just gets distracted and doesn't nurse. He's offered food frequently, but often just take a quick nibble and is done. We're worried he's not really eating enough, but perhaps there's some data out there to give us a better idea of how concerned or not we should be.We've been weighing a recording diaper weights, but we have no idea how that correlates to the input of a ~15 Lb 7 month-old baby. Has anybody else gone down this road?Do you have any idea how much your child eats or how much eating is "healthy" for a child similar to ours.We have an older child who ate like a pig, so this wasn't ever even a question for him!tl;dr: Do you weight diapers? Any sense of if the output correlates to the input and how? Any insight into the amount of intake your baby is getting, and how big is your child if you know the intake? via /r/Parenting http://ift.tt/2ez5L8M