I thought the PLAPET dog comb was pretty good, but I thought it was a lie. My bitch kept losing hair after giving birth to the baby. It was useless to see the doctor and apply ointment. She was not very happy and felt a little autistic. . . Then I used this comb for it. When I first used it, I was timid and hid everywhere. After I got used to it, I enjoyed using it every day haha. It took about less than two weeks, and one day I was pleasantly surprised to find that the bald areas started to grow hair, which is ok. I plan to keep using it!