maxdad
Posted : 5/22/2007 6:38:18 PM
Great links Xeph !
I must also chime in that it is very difficult to judge a dog color before the final juvenile molt. Color genetics are complex, there are lots of recessive gene battling around in there, the dillute gene is also
a problem because its action is so progressive. A dog may look fine when adolescent and then by a few years old he lost his mask or the sadle becomes so pale it looks at a glance like a sable.
If you get your dog from a good breeder who concentrates on structure and temperament, color might not and usually is less consistent in the genome, if somewhat consistent in appeartance, i.e. there lots of recessive genes still hagning about in there, so litter color is more a toss, even coat type (long, short, etc) In reverse a breder breeding for color, like one concentrating on blacks, might have to be less stringent on structure or temperament. Can't have it both. A breeder breeding for whites (God forbid, but they have their fans) is even more playing russian roulette since the white is even more rare (recessive) so the gene pool is smaller, more inbreeding, more possibilities of other genetic faults...
Other color 'faults' have been associated with more genetic problems (the black dilute or blue is also in some breeds, but less in the GSD)
Some experts say that liver dilution (brown nose, brown pads and lips) has actually less problems than once though, it was once associated with deadly genetic defects.
Pure white is associated with deafness in some breeds (white all over, not the same as albino because nose and pads remain black)
but the main reason the founder of the breed marked it as undesirable was because white is a bad color for working herders
and obviously for guide dogs and police work (less visible).
At least that is how I understand it up to know
Please Xeph, correct me if I got that wrong !!
For example in the litter Hans came from there was one longer haired type, one very dark, Hans who was dark but brown or faucve points on cheeks and above eyes, darker tan than usually seen. Xaver's dad has very plush coat, witohut being a longcoat, but not his mother. So Hans color might and probably pale as he matures, keeping the sadle pattern, it is very hard to know in advance if the rich color of his ancestors on the Father side will sow up later....