Ingredient index

Every ingredient the catalogue references, what it does, and why it might matter. 891 entries.

All 891 Beneficial 9 Neutral 879 Caution 2 Use with care 1
Tea Tree (Melaleuca Alternifolia) Essential Oil
Fragrance / antimicrobial agent
Toxic to dogs and cats at low doses. A 2014 review of over 400 cases found the majority of poisonings resulted from products applied deliberately for therapeutic reasons, not accidental ingestion — meaning the exposure route is the product itself. High-risk in any leave-on or cat-accessible formulation.
evidence: high
Use with care

Read this before you trust the number

This application is intended for educational purposes only. Scores are generated using publicly available product information and are not veterinary advice. We are not veterinarians. Always consult your veterinarian regarding medical decisions.

A high score does not mean a product is right for your pet, and a low score does not mean it is dangerous. An individual animal can react to an ingredient that scores well here, and a product with a mediocre score may be exactly what your vet recommends.

The score reads ingredients one at a time. It cannot account for how ingredients interact with each other, with other products you use, or with your pet's medications and conditions. Two ingredients that are each fine on their own may not be fine together. A score is a starting point for questions, not a substitute for professional judgment.