Nat,
My 99 / mum also not suggest to eat 糊仔, but in my point of view, just let BB try for the first few days to see what happen. As i said before, during the first few times, BB may not eat solid food very well and just eat a little, it's difficult to make congee for such little amount, so I suggest have 糊仔 first to see what has happen, and when she can take a whole bowl, then you can start to cook congee.