This depends on what you mean by 'milk white'. Most horses are grey (black skin under a grey or white coat.) and several breeds fall into this color range, such as the Lippizaner, and the Camargue. The 'Camarillo white horse' (White coat and pink skin underneath) is a true white horse breed and is very rare. Other breeds can produce white horses but it is rare.
Get a president jockey, and just breed with a vitamin
breed a male white Zebra and a female cream zebra
get the male horse a white zebra and the female horse a cream zebra then breed using the 30% vitamun
chances are you will get a black horse with white small white specks.
Lipizan
the paint horse is a quarter horse. they are colored like brown and white, black and white. buckskin and white, any color that a horse is, with white.
White
It's a paint horse. A black and white paint horse.
None. There is no breed that gives this colour of milk. All milk from all breeds of dairy cows is white.
The Friesian Horse. Black with very little or no white markings.
The Queen's favorite horse breed, and her choice to pull her carriage, is the Cleveland Bay.
Lippizanner