A dog's character trait relating to resiliency against illness and disease is known as?

The term that refers to a dog's character trait relating to resiliency against illness and disease is hardiness. Hardiness encompasses a dog's ability to withstand environmental stressors and recover quickly from injuries or illnesses. This trait is crucial for working dogs, such as those used in narcotics detection, as they often encounter a variety of stressful situations that can strain their physical health. A hardy dog is more likely to maintain peak performance despite challenging conditions, making this characteristic vital for their effectiveness and longevity in service.

Agility pertains to a dog's physical ability to move quickly and easily, which is not directly related to health resilience. Distractibility involves a dog's focus and attentiveness, while dogfight tendency describes aggressive behaviors, neither of which address the concept of a dog’s resilience to disease or illness.