Dogs do produce tears, but they do not cry emotional tears like humans do. Their tears primarily serve to lubricate and protect the eyes rather than express emotions. If dogs appear to have watery eyes or tear stains, it is usually due to physical reasons such as irritation, allergies, blocked tear ducts, infections, or injuries. While dogs do not cry tears from sadness or happiness, they express emotions through vocalizations like whining, whimpering, and body language such as lowered ears or a tucked tail. Scientific studies show that dogs can produce more tears when emotionally stimulated, such as when reunited with their owners, possibly linked to oxytocin, but this is different from human emotional crying.
