Change of Formula Milk Powder

Time flies...and now that Renee's 3, it's time to change her milk powder from Gain IQ to GROW(for 3-6 yrs old) and as the tin of Gain IQ has got just that little bit left, I thought I had better start to mix the powders for her to get used to the new taste(ok to mix as they're of the same brand). She seem to realise that it's of a new mixture and didn't finish all the 300ml, but then again, she's just had her lunch not too long ago, so shall see how it goes the next few mixes...