Entice her to come and play with a laser toy and treat her every time she “catches” the beam. Also if she needs coaxing, placing a calming collar on her made from natural calmatives, such as lavender, will make her feel more composed. You can also place a plug-in pheromone diffuser in the room or rooms she spends most of her time.
When cats are happy and comfortable in their surroundings, they often rub their faces on furniture, another cat or even their favorite people. This is a marking behavior, and the effect of these scents is thought to be positive and soothing. Pheromone sprays mimic their natural scents and make cats feel more comfortable.
However, if you cat is really very stressed and reticent, you may try putting her in a special garment called a Thundershirt. In many countries around the world, it's common for mothers to swaddle their babies, keeping them wrapped and close to their bodies, whether it’s on their mom's back or in a more modern-styled baby sling. The Thundershirt works on the same swaddling principle to relieve stress and anxiety. It is believed that pressure has a calming effect on the nervous system of pets, too, releasing calming hormones like endorphins or oxytocins.