Hi I'm new to this. I'm at my wits end and need help. My ds was born a wk early and weighed 6lb 6oz. She's now 6 mths and only 11 and half pounds. She never seemed to be interested in milk. Formula fed. So slow gaining weight. She was put on a prescription milk (infatrini ) at 3 and half mths. She took it ok fr few weeks but now will only take 3/4 oz when sleeping. She's not very interested either in solids. She's under dietician and paeds dr. They seem to be dragging their feet. She just never seems to be hungry. She also has hip dispasia and in a spica cast. This is not a problem as she was like this before she had cast put on. Any advice appreciated. I'm so worried a bout her. Every feed is a constant n battle. This is my first baby.