I would use the whole milk too, it used to be recommend to use full fat up to the age of 5 but they've changed it to 2 recently. But there's no evidence that using low fat milk at a young age prevents heart disease- - how could it, I am over 40 and when i was a kid we drank full fat milk! And there were hardly any overweight kids either. So where's the cohort who are at heart attack age who drank low fat milk as kids? It's all just one big experiment - on our babies!
Sorry for the rant, it just really annoys me when medics tell you do to stuff without any proper evidence for it.