why do dogs shiver

Dogs shiver for several reasons, including being cold, feeling excitement, experiencing stress or anxiety, seeking attention, or because of pain or illness. Shivering helps them raise their body temperature when cold by involuntarily tightening and relaxing muscles. Excitement and strong emotions can also cause shivering, which is often harmless. However, if shivering is due to pain, illness, or persistent stress, it may be a sign that veterinary care is needed. Additionally, dogs may shake to dry off if they are wet, as shaking off water is much more energy efficient than drying with body heat.