I've just about had enough of making up bottles of formula. I know the official line is that babies need formula until one year old but is this really true. it would be so nice and much easier to be able to pour out a bit of ordinary cows milk when required. What is the reason for using formula until one year old? And if my 9-month old is having a good diet is it really necessary. By the way we are vegetarian (no meat or fish).