What are a dogs external stimuli?

A dog's external stimuli include various sensory inputs such as sight, sound, smell, touch, and taste. They are particularly sensitive to smells and can detect odors at much lower concentrations than humans. Sounds, including high-pitched noises and specific tones, also capture their attention. Additionally, visual cues, such as movement and body language of humans and other animals, play a crucial role in how dogs interact with their environment.