Answer: Hi there,
yes today long-life milk is a far better quality and is fine for toddlers. There is probably no need to dilute the milk especially if he is eating a healthy diet.

There is a tip sheet on milk and toddlers that I wrote on Huggies and I have placed the link below:

What children should drink
http://huggies.com.au/BeingAParent/FeedingYourBaby/SolidsAndBeyond/InfantDrinks.asp

Milk
http://www.huggies.com.au/baby-care/baby-feeding/nutrition/milk-intake

Hope that is helpful
All the best
Leanne