Hi Katie, 
I suspect that if the mother were eating paleo, she might be producing
enough milk for the baby and the baby would not be reacting to the
supplemental formula. 

I don't eat paleo all the time, but I never eat gluten or dairy. I'm afraid
that I succumb to my sweet tooth all too frequently, and with the Xmas
season looming, I'm not optimistic about my compliance over the next couple
of weeks. 

best wishes, 
Ron