My lo is 16 weeks on Thursday, lately she has changed her feeding pattern completely. Sometimes she will only have her regular 5oz every 4 hours or demand 6 hours and go between 3 - 5 hours. I'm a first time mum and completely confused as what to do. My new hv doesn't seem bothered, I have only just moved to a new area so been given a hv to help inform me of children clinics etc. Also I can now see lo ribs when she breaths in and out is this normal? Please any advise would be great, also lo is on formula if that makes any difference (I know bf is healthy unfortunately this just didn't work comfortably with me, no judgement please)