HELP! How many oz a day does your 9mo take

My soon to be 9mo is having a milk strike and only taking 3-4oz of formula a feeding. She will eat about 4oz of puree and yogurt mix at daycare for lunch and we are working on solid foods and self feeding at dinner, so she doesn't eat much. She flat out refuses any puree or food resembling a puree at home now. I'm worried she isn't getting enough! Any suggestions!? UPDATE: Thanks everyone, she ended up getting very congested and now has a fever, thinking it all has to do with that :(!