Hi mummy's, I was wondering if is ok and safe to change formula milk? I have a 6 months baby who's has been taken aptamil from birth, we are currently on holiday and difficult to find Aptamil where we are so I bought Cow and Gate which he is drinking it we no fuss, he seems to like it, also he always seems to be quite a lot sicky with his usual formula and with the Cow and Gate he hasn't been sick so I was thinking to stick to this milk but just wondering if it is safe?