Why do cats like percussion massagers so much?? Cat's purrs are more than just a sign of contentmentthey may actually promote healing in both cats and humans. Research suggests that the vibration frequency of a cat's purr, typically between 25 Electric Cat Head Massager Dog Pet Massage Machine Vibrating Scalp Cha Isardia My Cat's Secret Obsession! Why Felines Adore Massagers & Vibrators Why Is My Cat Making a Vibrating Noise? Vet Approved Explanation Catster