Originally called the HHHHHMM Scale, this tool was created by Dr. This Quality of Life Scale was specifically created to help cat owners navigate the difficult path of end-of-life care so that they can make the best decisions for their feline family members. And since cats are notorious for hiding their pain and discomfort, it becomes even more difficult to decipher their level of pain and comfort. While euthanasia is the kindest thing we can do for pets that are suffering, every pet parent wants to be assured that they are doing it at the right time.