What are the most likely complications of a mid diaphyseal fracture of the left radius and ulna in a puppy?

A mid diaphyseal fracture of the left radius and ulna in a puppy can lead to several complications due to the growth and development of the bones. The correct choice focuses on carpal valgus and premature ulnar physeal closure as likely complications associated with such fractures.

Carpal valgus is an angulation of the carpus (wrist) away from the midline of the body, which can occur when there is an imbalance in the growth of the radius and ulna following a fracture. If the ulnar growth is affected more significantly than the radial growth due to the fracture, it can lead to this valgus deformity.

Premature closure of the ulnar physis can also occur as the healing process and subsequent growth are disrupted. The ulna is critical for proper alignment and length of the limb, and if its growth is stunted, it can lead to deformities such as carpal valgus. This option correctly identifies these two specific complications that are most likely to arise from the injury in question, reflecting a comprehensive understanding of the growth patterns and potential orthopedic outcomes in young animals.

Other options may involve complications that are less likely or misidentified. Understanding the underlying growth dynamics in young dogs provides insight