oh dear, poor dd!! If she has an appetite, i would just continue with solids but try more BRAT diet as it is easier for the stomach to digest for the energy she needs to fight off the infection. Milk isnt that easy to digest, some kids are very aware of what the bodies need. DS was super hungry baby and used to drink a lot but whenever he was ill, he would stop completeu with milk and would eat only rice and banana. maybe you can give her mashed banana and rice cereal without milk?
healthy vibes for her xx