@Rachel weetabix which she’s had before but only with breast milk
Sounds like it could be an allergy. You could leave it a few days to make sure it's not just fussiness or illness and then try again. If the same thing happens then you know.
Should only give cows milk at 12 months uncooked Fine if cooked That sounds tricky :/
Ah I got the impression you weren’t cooking it
What did you give it to her with?