Hun, I think she is doing well. I just had little miss weighed today and at 4 months is 59cm and 5.2kg and she started 1.5kg heavier. I was a little worried about her weight but my chn wasn't concerned at all. She said she looks healthy and bright so she's doing fine. It's strange for me after 3 babies that sat on the 90% to now have one on the 10%. Dd2 isn't a big eater so I have always worried about how much she's putting on. But her output is generally good and she's a happy content little thing so maybe I'm just worrying for no reason.