You can tell by the way this dog’s weight and ears are back, its tail is tucked and there is tension that it is under stress.

Stress is the body’s reaction to a change that requires a physical, mental or emotional adjustment or response. Dogs who are experiencing complex behaviour concerns such as fear, reactivity or anxiety are dogs that tend to be in a high state of stress and arousal. A stressful emotional response will inhibit clear thinking and activate the...