A clearer picture of how your pet is doing.
When changes happen gradually, it can be difficult to step back and see how much your pet’s day-to-day life has changed.
This guided assessment looks at seven important areas of quality of life and can help you notice patterns in your pet’s comfort, function and enjoyment.
Evidence behind this assessment.
This assessment uses an established veterinary end-of-life framework as its scoring backbone and draws on contemporary research into canine and feline quality of life.
What is the HHHHHMM Quality of Life Scale?
The scored part of this assessment is based on the HHHHHMM Quality of Life Scale developed by veterinary oncologist Dr Alice Villalobos for animals receiving palliative and end-of-life care.
The seven areas are Hurt, Hunger, Hydration, Hygiene, Happiness, Mobility and More Good Days Than Bad.
The purpose of a tool like this is not to make the decision for you, but to provide a more structured way of thinking about changes that may otherwise be difficult to see.
Villalobos A. Quality of Life Scale — The HHHHHMM Scale. Veterinary Practice News.
Has the HHHHHMM scale been studied?
A peer-reviewed 2023 study evaluated the HHHHHMM scale in 314 companion-animal owners. The study used a 1–10 response scale for each of the seven areas.
The scale demonstrated good internal consistency. The initial one-factor model had partially adequate fit, while a modified model showed good fit.
This supports use of the scale as a structured quality-of-life tool, but does not mean that one numerical score can determine whether euthanasia is appropriate for an individual animal.
Testoni I, De Vincenzo C, Campigli M, et al. Validation of the HHHHHMM Scale in the Italian Context. Animals. 2023;13:1049. PMID: 36978590.
Why consider more than physical illness?
The AAHA/IAAHPC End-of-Life Care Guidelines describe quality of life as involving physical, social and emotional wellbeing.
Their end-of-life considerations include pain, breathing, eating and drinking, elimination, mobility, interaction, environmental comfort and emotional wellbeing.
American Animal Hospital Association and International Association for Animal Hospice and Palliative Care. End-of-Life Care Guidelines for Dogs and Cats.
What does broader quality-of-life research show?
A 2022 review identified nine published generic quality-of-life instruments for dogs and cats. Activity, interaction and appetite appeared repeatedly across different tools.
The review also found considerable variation in how veterinary quality-of-life tools have been developed and validated. No generic instrument in that review had been validated across every psychometric property considered.
Fulmer AE, Laven LJ, Hill KE. Quality of Life Measurement in Dogs and Cats: A Scoping Review of Generic Tools. Animals. 2022;12:400. PMID: 35158723.
What does newer dog and cat research add?
Contemporary canine quality-of-life research supports a multidimensional approach rather than relying on one clinical sign alone.
Recent feline research has similarly validated quality-of-life dimensions including activity, relaxation, mobility, appetite and sociability.
Lavan RP et al. Development and Validation of a Canine Health-Related Quality of Life Questionnaire. Animals. 2023. PMID: 37893979.
Albergante L et al. A new generic feline quality of life questionnaire: development and validation. Journal of Feline Medicine and Surgery. 2026. PMID: 42363431.
Important limitation
This Compassionate Paws web assessment has not itself undergone independent psychometric validation.
It uses the established HHHHHMM framework for the numerical score, with explanatory wording informed by veterinary end-of-life guidance and quality-of-life research.
It is intended to help families notice patterns, monitor change and have more informed conversations with their veterinarian. It does not diagnose illness and cannot determine on its own whether euthanasia is appropriate.