We have a female 1year old sheltie sable in color and would like to get a male companion but with different coloring ....there is a male sable merle in the litter that I was initially drawn to but would or could this be a mistake and the dog end up with defects , washed out sable color ? We just want a unique coloring and different from our female we love so dearly. The mother is quite white looking and the dad is a pure sable.