westie-jack puppies

Question
we just a litter of 8   all of them are brown ---both parents are white --will they change and how long does it take?   mthe mother is the Jack dad is west highlands

Answer
Allthe puppies are 100% brown? then they can not be even of two crosses...jacks are to be 50% or more white and I've enver seen a totaly brown one and westies are to be all white...if the pups are brown one of the parents might be crossed with something ese as well...but if they are brown they will stay brown but might lighten a bit with age.