Temperament and nature (character) are two separate things. Environment (for instance early socialisation, good or bad experiences etc) can and does affect behavior either for good or for bad. Character is inborn and does not change.
SOUNDNESS IN BODY or FORM TO FUNCTION is just another name for correct conformation (anatomy, or skeletal body structure with its attending coverings of soft tissue). A Cobberdog with overall correctness in the ratio of long bones to short bones. their angles to one another, and the covering of muscle and other soft tissue will move with the least stress on joints ligaments and tendons and is far less likely to develop OCD's ( such as HD and elbow dysplasia) or arthritis even into old age.
This means that all the body parts (conformation) should be in correct balance and symmetry in relation to one another. It is critically important to avoid breeding for exaggerated features, because this causes lack of balance, which puts strain on ligaments tendons muscles and joints. For instance If narrow is 'good' then narrower is not better. Over thirty or so years in the show ring, I saw trends and fashions come and go. In some cases I observed pure breeds steadily decline in functionality, including my own beloved breed of that time, the German Shepherd Dog, which is a classic example.
* Powerful short back (protects hindquarters & elbows in movement
* Slight rise over the loins (powerfully connects front and rear in movement)
* Long sloping shoulders and stifles (to synchronise stretch in movement)
* Brisket neither too deep nor too shallow ( heart room and breathing)
* Elbows neither tucked in nor jutting out (in alignment with withers for balance)
* Slight dip behind withers to separate neck from the start of the back
* Sufficient length of neck (to free the shoulders in movement)
* Strong short hocks (to support the impact of hind feet as they strike the ground)
* Straight strong front legs perpendicular to the ground (support weight in front)
* Moderately deep chest, not too broad nor deep (not pre-disposed to bloat)
* Well proportioned head and face with a sweet alert expression.
Stride should be light footed, airy, long, elastic and effortless in the Australian Cobberdog, with the impulsion from behind being transmitted through powerful well coupled loins and released through well angulated shoulders, which govern the length of stride in front. Cobberdogs which move correctly "look" as if they are floating. The next two photos clearly show what is meant by full extension of the hind and fore limbs.