Ladies, has anyone had kids go into ketosis due to low weight, illness, poor appetite, and long brea…

Ladies, has anyone had kids go into ketosis due to low weight, illness, poor appetite, and long breaks between meals? How did it resolve and when? My daughter has gone into ketosis twice since mid-September: the first time she had vomiting, and now it's a fever and that's it. We've started dancing, her weight is 14.4 kg (31.7 lbs) and height is 103 cm (40.5 in). I've researched everything, and diabetes has been ruled out. I've started incorporating more carbs and not letting her go more than 8 hours without eating. The AI suggests giving her something sweet both before and after dancing because, due to her weight, she uses up all her glycogen during training immediately.