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Originally Posted by kpstoybox  But is it really consistent?
In my personal experience and from what I have seen by the countless litters of online breeders...Biewer litters... for the most part...do not follow a consistent pattern. The Irish spotting gene is just one of the patterns associated with the piebald gene. It produces the dark color over the back and down the legs...especially the back legs...and sometimes the front.
And yes...this pattern can and does occur in Biewer's. But it does not consistently throw itself...even from parents that both carry those markings. Here is a great link that explains why. White spotting on Cardigans, Collies, and other herding dogs Ruffly Speaking: Railing against idiocy since 2004
I bred two Biewers (one that I would consider nicely show marked and the other heavy Irish spotted marked)...and got a puppy that was just about all white on her body. Yes..they eventually produced a few puppies with markings like they carried themselves. But they produced more "whiter" puppies as well. |
I was responding to Cirlonde's observation that biewers have a pattern to their markings and parti's don't. My reply was that most biewers have a gene that produces a predictable pattern, where as most partis have a genes that do not produce a predictable pattern.
There are going to be many parti's and biewers who have more than one type of spotting gene or parti's who have the irish spotting gene and biewers who have the extreme white piebald gene. .
Basically, there are spotting genes that produce predictable patterns and there are spotting genes that produce random spotting. :-)