Good day. Question for mothers of premature and underweight children. ...

Good day. Question for mothers of premature and underweight children. Daughter was born at 36 weeks with weight 1960gr. Discharged from the hospital with weight 2.5kg. Doctor said to feed her Nutrilon pre 1 and dairy through separate times. One bowel movement per day, or maybe every other day, they gave Bifidumbacterin in the hospital. Pediatrician also said to give it at home. She ate everything normally, but she vomited. For a week we have been hot, daughter started to eat less mixture, sometimes 10-20 ml, sometimes 30ml. But she eats less now. Because of the heat, is it or something not