![Stress smell makes dogs pessimistic Stress smell makes dogs pessimistic](https://www.wissenschaft.de/wp-content/uploads/2/2/22-Jul-Dogs-stress-study-image-2-990x704.jpeg)
Air laden with tension apparently has a detrimental effect on dogs’ mood: when they smell stressed people, they approach new things with a more pessimistic attitude, study results suggest. This could therefore be a form of emotional contagion between humans and animals, say the researchers.