Milk Thistle
Silybum marianum
The go-to liver support herb for pets. One of the most evidence-backed herbs in veterinary medicine. Used after drug therapy, toxin exposure, or for ongoing liver health.
Consult Your Veterinarian First
This information is for educational purposes only. Always consult a qualified veterinarian before using herbal remedies for your pet — especially if they are on medication, pregnant, or have existing health conditions.
Species Safety
An herb safe for one species may be toxic to another.
Dogs
SafeDuration: long term
Cats
SafeDuration: long term
Horses
SafeDuration: long term
Birds
Use CautionDuration: short term
Dosing Guide
General guidance only — always consult your veterinarian.
| Species | Form | Dose | Frequency | Notes |
|---|---|---|---|---|
| Dogs | capsule | 2-5 mg /lb | twice daily | Standardized silymarin extract |
| Cats | capsule | 50-100 mg | twice daily | Open capsule and mix into wet food |
| Horses | dried herb | 10-20 grams | twice daily | — |
Active Compounds
Compounds marked Cat Unsafe (phenols and many terpenes) cannot be metabolized by feline livers.
Quick Info
Plant Family
Asteraceae
Parts Used
seed
Available Forms
capsule, dried herb, glycerin tincture
Explore More Pet Resources
Find more herbs, check interactions, or review toxic plants for pets.