I use the thunder shirt to clip his nails. And I guarantee that he is notstressed or The Grinch stole my lesson plan shirt! He purrs the whole time. It actually relieves the stress and helps him relax! How do you know how the cat in this video or any other cat feels? Because I know how mine feels! But all cats are different just like people. Some cats may be stressed out by it and some may not. Obviously this cat isn’t too happy, based on his behavior and actions. If you have had cats your whole life and know them so well.