Not sure hun,
I know they aren't meant to have dairy until 1 yr+. I gave my daughter formula until about 15mths, I was so used to it, it just never occured to me to give her cows milk. Having said that, she would have yogurts from about 7 mths... which is dairy, and she was fine. So I'm not sure basically. Not sure in the sense of, I don't know if they are not meant to have dairy because it's bad for them, or because formula has more nutrients and stuff in because its made etc?
To be safe, I personally, would prob bring formula
Sorry not much help xxx