BioMechanical Model and Harmony in Dog Structure Seminar from Dr Evgenij Yerusalimsky

We have to accentuate once again that the 1^st postulate is the main general index.

Its use as selective key purposefully leads to the most valuable complex, i.e. compactness, strong back, deep chest as well as it also gives some additional positive effect concerning better limbs angulations and more correct format.

The breeding of the entire Schnauzer Moscow population has been measured according to the BMD over 30 years.

During 1985 – 1992 years we produced at least 200 litters in Moscow per year.

In 1991 in Moscow 841 Schnauzer p/s were entered at the Soviet Club Specialty, which became the world record.

Application of the BMD in the Schnauzer breeding within that period has been very efficient also for the future: from 1996 to nowadays we produced repeated World& European Champions, ISPU-Winners and numerous International Champions.

Along our researches of the dog conformation viewed from Biomechanics we have made other researches since 1987 devoted to the Harmony of the dog exterior.

Purpose of these new researches was to find out the anatomical dog proportions important for a judge to evaluate a dog harmony.

With this object we have used the “Golden Section” (GS) as the universal form building principle.

As the GS we consider the smallest root X1 = (√5 -1 ) : 2 of square equation

1:X = X: (1-X) corresponding to the Extreme and Mean Ratio when smaller dimension of segment (0,1) is to the greater as the greater is to the whole.

They usually consider its approximate meaning, 0,618, but for our practical purposes we use 0,6 = 3/5 because of measurements mistakes.

It’s important for our researches to remember that GS is also limit of modified Fibonacci series 1, ½, 2/3, 3/5, 5/8, 8/13, 13/21, 21/34, 34/55, 55/89,…

The initial Fibonacci series looks as follows: 1,1,2,3,5,8,13,21,34,55,89,…

While evaluating the best specimen conformation of numerous different breeds we have revealed how the GS works as the form-building principle with the dog.

We have succeeded in detection of several “golden proportions” (GP), which totality we named as the “Harmonic model of the dog” (HMD).

Those canine body GP account for the harmonious built of the dog, and they are valid for the overwhelming majority of the breeds.

Statistics bear out all related hypotheses.

During our practical work over last 30 years or when breeding either judging different breeds with the application of BMD&HMD we permanently compared the results based on both approaches.

Regarding our statistics we can corroborate that use of the BMD as the selective instrument mainly has led us to the high degree accordance with the HMD.

We shortly reminded now about both model approaches that expound there what is the final result of their mutual application.

Over the last 10 years we often used for breeding the only part of the BMD, i.e. three its postulates: principle 2:1:1, principle of two horizontals and principle of two verticals.

And the conformation quality of new generation dogs we have produced over that period was not worse than previous ones when we used the entire BMD.

Moreover high degree accordance of the reduced BMD with HMD has been remained at the same level.

Due to that fact importance we have been enforced to reconsider the totality of mentioned above three postulates.

But before analyzing that fact let us remind that the majority of the breeds are free from achondroplasia.