So my babies are almost two months old. And since yesterday my daughter hasn’t want to eat like…

So my babies are almost two months old. And since yesterday my daughter hasn’t want to eat like normal. Usually she takes 3oz and now she only taking 1/2oz to 1oz and had diarrhea in every diaper I change. What can I do for her my family said to give her Pedialyte. And she went from 7 lbs. 2 oz. back down to 6 lbs. 14 oz.