Stress responses in cats can manifest in various ways, such as excessive barking, hiding, diarrhea, and excessive grooming. The first step is to observe and identify the specific cause of the stress. This could be due to the arrival of a new family member or pet, or taking the cat to a new place, such as a veterinarian.

If a cat's stress response is very severe or lasts for a long time, you may need to consider consulting a veterinarian and using anti-anxiety medication to help the cat.