Comfrey Leaf
Symphytum officinale
Classic "knitbone" topical wound, bruise, and sprain herb rich in allantoin; used EXTERNALLY ONLY in modern veterinary herbalism due to pyrrolizidine alkaloid hepatotoxicity.
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: moderate term
Cats
SafeDuration: short term
Horses
SafeDuration: moderate term
Rabbits
UnsafeBirds
UnsafeGuinea Pigs
UnsafeDosing Guide
General guidance only — always consult your veterinarian.
| Species | Form | Dose | Frequency | Notes |
|---|---|---|---|---|
| Dogs | topical salve | 1-3 grams | twice daily | Apply thin layer to bruises/sprains; cover to prevent licking. NOT for open wounds. |
| Horses | poultice | 30-60 grams | once daily | Moistened dried leaf applied to splints, sprains, or hematomas under wrap. |
| Cats | topical salve | 0.5-1 grams | twice daily | Very thin layer with Elizabethan collar to prevent grooming. |
Active Compounds
Compounds marked Cat Unsafe (phenols and many terpenes) cannot be metabolized by feline livers.
Quick Info
Plant Family
Boraginaceae
Parts Used
leaf
Available Forms
dried herb, topical salve, poultice, infused oil
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