The manifestations of stress in cats may include the following:

Hide: Find a quiet, secluded place to hide.
Loss of appetite: may refuse to eat.
Excessive licking: Frequent licking of the body.
Anxiety: Demonstrates obvious anxious behaviors, such as pacing back and forth, restlessness, etc.
Decreased urine output: Stress may cause a decrease in urine output.
Rapid breathing: Breathing becomes rapid.
Avoiding people: Keeping a distance from humans or other animals.
Hair standing on end: Body hair standing on end.
Vomiting: Vomiting may occur.
Diarrhea: Intestinal dysfunction, resulting in diarrhea symptoms.
Weakened immunity: makes one more susceptible to illness.
Irritability: Becoming aggressive or irritable. If your cat shows signs of stress, try to minimize stressors and provide a quiet, comfortable environment. If symptoms persist or worsen, seek veterinary attention promptly.