###Human: I have twin baby girls. One of them is not gaining weight. Please help. ###Assistant: Hello.  Keep trying to give breastfeeds as much as possible till 6 months completion. Different brands of milk powder have different tastes. So, you can change what they like (as advised). Do not dilute more or give more concentrated milk. Usually, dilution mentioned on the package can be followed, that is, 30 ml for 1 scoop for most of the brands. But check with the manufractures' note. Do not use feeding bottle. Use bowl and spoon.You can use undiluted dairy milk (pasteurized). Check with your local pediatrician for supplements if needed. Check if there is adequate weight gain. Maintain proper hygiene while feeding, when using formula feed or top milk. Do not compromise on hygiene. I would like to know the following: Finally, breastfeeding is the best for the babies.