ummm...Boxers can't be white either...
This from the AKC Boxer breed standard
"The colors are fawn and brindle. Fawn shades vary from light tan to mahogany. The brindle ranges from sparse but clearly defined black stripes on a fawn background to such a heavy concentration of black striping that the essential fawn background color barely, although clearly, shows through (which may create the appearance of reverse brindling). White markings, if present, should be of such distribution as to enhance the dog's appearance, but may not exceed one-third of the entire coat. They are not desirable on the flanks or on the back of the torso proper. On the face, white may replace part of the otherwise essential black mask, and may extend in an upward path between the eyes, but it must not be excessive, so as to detract from true Boxer expression. The absence of white markings, the so-called "plain" fawn or brindle, is perfectly acceptable, and should not be penalized in any consideration of color. Disqualifications Boxers that are any color other than fawn or brindle. Boxers with a total of white markings exceeding one-third of the entire coat."
I think the daddy was different than the one they 'saw' or 'assume' bred the mom...As somebody else mentioned, short hair IS dominant; out of a litter like this, maybe one pup would have come out with a medium length coat. And if dad was a Boxer, none of those pups would have been white, because White is a disqualification of BOTH 'said' breeds that these pups parents were!!!!!