this is interesting stuff. a "paint is just a brown, black or chestnut horse with white patches. There are two types of patching, tobiano and overo. The features of overo patterning will allow some horses to be nearly all white but there will be a bit of colour in the mane or tail and it is the only time a horse has true white colouration except for socks, blazes, etc. In horse there is a gene called a diluting gene and it makes a chestnut a palamino, a bay into a buckskin etc. if both parents provide the diluting gene to the foetus then you get cremellos which to all intense purposes appear to be white. There is no evidence that a true albino has ever existed in the horse world. Horses do carry a gene for white colouring but if the foetus recieves a dominant white gene from both parents it will die in the womb. Hope someone finds this enlightening