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.
The Truth About Skipping Cycles (heats) to 'rest' the Bitch