Efter förfrågan kommer här fakta om avel och SM. Jag lägger ut originaltext och bilder från det världsledande forskarteamet om SM:
In an October 2010 interim report of the statistical results of following the SM protocol, Dr. Rusbridge stated that:
(A) Offspring without SM only occurred when there was at least one parent of Grade A status;
(B) There were higher numbers of SM clear offspring it both parents had Grade A;
(C) All Grade A* offspring (SM clear over 5 years) had at least one parent that was Grade A*;
(D) 100% of offspring were SM affected if both parents were SM-affected;
(E) SM also occurs in Grade A x Grade A crosses (approximately 25%, but this figure might be improved if more older dogs are screened dogs);
(F) Using dogs of unknown status was risky for SM affectedness;
(G) 50% of dogs in a Grade A x Unknown cross were SM affected.
*Note: Grade A* means that the dog had no SM at all and no CM at all.
Dr. Rusbridge provided these interim statistics:
● Matings of Code A CKCS to Code A CKCS have produced 75.9% offspring with no SM.
● Matings of Code A CKCS to either Code D, E, or F CKCS have produced 41.9% offspring with no SM.
● Matings of Code A CKCS to unscanned CKCS have produced 50.0% offspring with no SM.
● Matings of Code D CKCS to Code D, E, or F CKCS have produced no offspring free of SM.

http://cavalierhealth.org/smprotocol.htm
Den sista länken visar liknande parningschema som på bilden ovan men med ett uppdaterat och förbättrat system. Detta används idag.
PS: Glöm inte att studera det rödfärgade partiet noggrannt!