Was wondering if someone here could explain why this SL dog has turned out a great guard dog - Page 4

Thanks Ibrahim!

Yes smoke show dogs do well at work in spite of breeding only for looks.  Also there are many exceptions and people breeding work and sow lines in one in Europe. 

I have a friend who owned a very strong showline GSD. This dog could not track and had decent obedience but his bitework was over the top. He would have been 12 this year.
This male was bred to showline females but he never ever produced a puppy even similar to him.


About crossing the two bloodlines (sport and showline)... I would not recommend....
It doesn't work out...

Crossing SL with WL had been done many times and it may work. It is a matter of selecting the proper pup from such breeding for future breeding. It is not recommended for beginners and it should be done with SL dog with excelent working abilities and working structure and pigment and other attributes. It is done in order to improve on pigment and structure and to broaden genetic pool. 
Vilo v Arminius was such a SL dog 
with excellent working ethics. He was a great asset to working lines. The negative was slightly higher HD. But there is not perfect dog and such problem may be pushed back in future generations. 
Prager Hans

Back in the 80's and even early 90's many WG SL dogs could work nicely.  SL dogs were different 20 to 30 years ago.  

Would you incorporate this show dog into your breeding program. I probably would.  This video is from 2009.  Such dogs are always there. You just need to know where to look. 
http://www.youtube.com/watch?v=D9a2vGMl7pM

Ditto, Prager.

These good working  "Showline dogs" you are able to see where ever people take the time to raise and train well.
By visiting local German clubs you´ll find several.
Don´t take me wrong, some dogs are not suitable for sport, but you would be amazed to see the potential of some "showlines".

Nexx is a Hill grandson, I have seen several very serious Hill siblings during the time.

The most important element to introducing a SL to me would be is the dog representative of his litter and his parents?!   I have seen many people breed an exceptional animal that was an EXCEPTION in the litter, and then be surprised when they didn't produce many of the exceptional qualities in the resulting progeny. Just sayin.....I think I dog passes on what they are and what they are made up of......WL/SL  breeding can be successful, but where you go with the first generation produced is more important long term than the initial SL/WL breeding. If you go back to the same blood that was weak that caused you to do the cross in the first place....you are pissing in the wind....that's just my opinion.

use work-wise/drive-wise genetically dominant WL dog with SL dog with great working abilities and genetically dominant trait  ( which you are trying to improve) lacking in the WL. Like dark pigmentation. From that select the best specimen and line breed it on in drive-wise and work-wise  genetically dominant  working dog with dark pigment ( or what ever quality you're trying to improve). Do not line breed on the SL  any more for many generations. 
This may work, but not always and you will be looked  down upon by SL and WL people. 
This is a game for experienced and educated breeders who have guts to select out and even perform  culling. 
Breeding is not for pussies ...especially this kind. 
Prager Hans