Hey girls. My friend asked me to ask if her daughter is okay. She's 10…

Hey girls. My friend asked me to ask if her daughter is okay. She's 10 months old and they're on IV, the last two days the baby hasn't taken the bottle, she spits it out twice and starts crying/crying, she doesn't eat porridge or puree much either, she sucks on the pacifier normally, she started arching when given the bottle, the mouth cavity is clean. Since yesterday, this behavior and today. What could be wrong? Why is the baby not sucking the bottle with formula and doesn't eat much of the complementary food and porridge?