It’s fine to give them blue milk before 12m if it’s a bit mixed in with food. Well that was my understanding anyway so it would be fine… but then again if they’ve never tried cows milk or Weetabix before maybe just do one at a time as both are allergens
If you are in uk then whole milk is fine to give in foods x
Cows milk is fine in food from 6 months old, it just shouldn’t replace their breastmilk/ formula as their main drink until 1.
If it’s pasteurised whole milk I believe it’s fine to mix in with Weetabix/porridge. just do not to allow them to have cows milk as a drink before 12m