My pediatrician said it's totally normal to weigh discharge weight at 2 weeks. They lose up to 10 up their weight within the first few days, and as long as they weigh AT LEAST their discharge weight at 2 weeks, that means they are growing properly. That being said, FF babies tend to poop more and have pasty poop, because the formula is harder for their body to digest..
That makes no sense. DS was already 10 percent down from his birthweight. He wasn't gaining anything.