RE: When did you switch over to whole milk?
I switched Sarah at around 13 months. I started the transition when she was 12 months and did it gradually. She had some trouble when I tried to make the transition quicker than that.
In general, milk is a food and a good source of fat, calcium and protein. But it is not considered a "complete" diet, like formula or breastmilk is for a baby. If a one year old doesn't eat a wide variety of foods or has been slow to grow or thrive, then some peds will recommend continuing formula.
I think the reasons for continuing to breastfeed past one year is, in general, less for nutritional reasons than for other reasons. And all the moms I know personally who breastfed past one year, started their babies on milk in sippies as a beverage with meals once they turned a year.
Beth, mom to older DD (8/01) and younger DD (10/06) and always missing Leah (4/22 - 5/1/05)