I don't like packaged milk for my 4 yr old kid. Can anyone recommend a fresh dairy milk vendor in SG?

You can consider Dairy Folks. Made in Singapore (the cows are reared in Singapore), it's pasteurized, hormone and antibiotic free. It is not available in the supermarkets but you can purchase it from their website. Each 1L pack is $5.50 (free delivery for orders above $20, otherwise, there is a $5 delivery charge; Allow 3 working days for delivery.) http://dairyfolks.com/product/dairyfolks-fresh-milk/