Mr. Donald asked me a difficult question - Page 8

Some may argue that my lines representing the shoulder blade and front upper arm are not very correct, that might be true as it is a guess work where the point of front upper arm is, but the chest depth is very clear and very close to reality and we can safely say Dingo had a near to perfect chest depth.

Now let us see the effect of pastern length.

This is a standing dog, pastern is 25% from front leg at correct angle of 22 degrees 

Corresponding reach

This is a standing dog, pastern is 30% from front leg at correct angle 22 degrees

 

Corresponding reach

We can see that the dog with longer pastern gained 0.40 cmas and that is a gain of approximately 1%, a side note if you look at Dingo he had a relatively long pastern.

If you remember the total bones lengths of fore assembly in ideal dog of 65 cms height was 72.49. In this case were the pastern is 30% from front leg the sum of all bones lengths is 72.64 cms with an increase of 0.15 cms which is negligible.

And let us see the effect of pastern angle

This is a standing dog with 25% pastern from front leg but at 30 degrees.

Corresponding reach

As you can see there is a gain in reach here (more than that dog of 22 degree pastern) of 0.80 cms which is 1.85%, which means increasing the pastern angle almost has double the effect of increasing its proportion from the front leg, interesting (Ah I'm not suggesting breeding for weak pasterns here, no just demonstrating the effect on front reach, lol.).

If you remember the sum of bone lengths of a 65 cms high ideal dog of 22 degrees pastern was 72.49 cms, in this case when the pastern is set at 30 degrees the sum is 73.16 cms, with an increase of 0.67 cms. Just a side note here, change of angles has more effect on total bone lengths than inter-change of proportions. Also a note increasing the angulations increases the total sum of bone lengths. Also it means that the show line which has deeper angulations than those of the working line dog has longer bones.
That needs longer and stronger muscles and tendons !!! Just thinking !!!

In another thread Susie mentioned that the Sl has long muscles while Wl has thicker muscles, does that have to do with bone lengths !!! Just wondering !!! Come on guys just let me know at least you're following 
Ibrahim

Ok let's go to the shoulder which is as a matter of fact more complicated and has gig effect on the front reach due to 2 angles involved and two lengths of bones which make a valuable sum of the total bones lengths in the fore assembly and I assure you I have no knowledge of the exact outcome other than the general scientific logic I did in the very beginning of this thread through which I analyzed each component effect on front reach in general without exact dimensions like I am doing now. What I'm doing now is more precise as various components when they change in proportion and or in angle cause make consequent changes on the other components.
Let's just keep in mind the line of ideal balance (center of gravity) or whatever you may call it, which Mr. Donald explained in his study and which is of extreme importance and effect on proper basic assembly of the fore of the GSD.

Lets see first the 45 degree shoulder and 45 degree front upper arm which (if were possible in reality) would make the premium shoulder assembly.

This is an ideal GSD in standing, but with 45 degrees in shoulder and in front upper arm (most experts argue this case is not possible and not achievable) (more real is a 45 degree in shoulder and 53 degree in front upper arm)