Girls, hello everyone! Is there anyone here with kids on IV? Such a pr…

Girls, hello everyone! Is there anyone here with kids on IV? Such a problem, we're going to be two months soon. The norm for the little one should be 120-130 ml, but why is she eating 80 ml then asking after an hour and a half again somewhere around 60. What to do in such a situation? They say that a break with an interval of 3-4 hours is needed if she eats 120 ml at once, but she doesn't eat it. I don't understand if she's tired or what? Please advise on what to do in this situation.