Instead of calming treats get feline cat pheromones calming diffusers. You can buy on Amazon, I use the Comfort Zone brand and have 2 set up one in the cat room and one in the living area. My other suggestion is she needs a friend as in another cat or kitten to keep her company. Probably didn't want to hear that last suggestion. You can also get repel spray to keep her from areas she is clawing her way through or make a mixture of white vinegar and water which when applied will deter them for awhile which is what I used so I didn't have to use chemicals. Good luck.