Nanny needing mothers opinions

I have been a nanny for five years and I have a little brother who is 9 years younger than me so I have quite a bit of experience with babies . The family I work for decided for whatever reason that they were not going to try any baby food until 9 months so one baby is doing very well and loves all the baby food and the other refuses to eat it . She only allows them to have veggies no meat and no fruit so the little girl will refuse to eat and will only take a bottle .  Is this normal ? Does anyone have any suggestions ?