Black Walnut

Not listed does not mean safe.

MONGO (uploader; released into the public domain) · Public domain · Photo source · shows: Juglans nigra

Juglans nigra

Family: Juglandaceae · ASPCA plant record

Verdict at a glance

🐱 Cats✓ Non-toxicASPCA Toxic and Non-Toxic Plants

🐶 Dogs⚠ ToxicASPCA Toxic and Non-Toxic Plants

Show all animals

🐴 Horses⚠ ToxicASPCA Toxic and Non-Toxic Plants

🐰 Rabbits! CautionWHRS Class 3: low-level toxin

Evidence by animal

Sourced plant verdicts — read the original wording and scope
Animal	Verdict	Basis	Plant parts	Sources	Evidence link
Companion mammals
Cats	Cats: ✓ Non-toxic		Not specified	ASPCA Toxic and Non-Toxic Plants Poison control	evidence
Dogs	Dogs: ⚠ Toxic		Not specified	ASPCA Toxic and Non-Toxic Plants Poison control	evidence
Horses & livestock
Horses	Horses: ⚠ Toxic		Not specified	ASPCA Toxic and Non-Toxic Plants Poison control	evidence
Small mammals
Rabbits	Rabbits: ! Caution	WHRS Class 3: low-level toxin	Not specified	Wisconsin House Rabbit Society Rescue/education group	evidence

Source excerpts

ASPCA Toxic and Non-Toxic Plants — Cats

poison-control

Non-Toxic to Cats

Source checked 2026-10-27

Read original source

ASPCA Toxic and Non-Toxic Plants — Dogs, Horses

poison-control

Toxic to Dogs, Toxic to Horses

Source checked 2026-10-27

Read original source

Wisconsin House Rabbit Society — Classes of Toxic Plants — Rabbits

rescue-education

WHRS Class 3: low-level toxin · Wisconsin House Rabbit Society chapter list (G. Flentke, 2012): Class 3 — "Low risk plants": "Low-level toxins or toxins that herbivores, such as rabbits, routinely handle better than non-herbivore species" (list heading: "Low Level Toxins"). WHRS says to watch the rabbit for signs of poisoning.

Black Walnut

Source checked 2026-10-27

Read original source

No evidence collected in this database yet for 19 animals

No evidence collected in this database yet for: Guinea pigs, Hamsters, Rats, Mice, Chinchillas, Ferrets, Pet birds (general), Parrots (macaws, Amazons, African greys…), Budgerigars (budgies), Cockatiels, Lovebirds, Canaries, Finches, Pigeons & doves, Tortoises, Bearded dragons, Iguanas, Goats, Chickens & other poultry

No supported claim has been collected for these animals. Not listed does not mean safe; do not infer suitability from another species.

Toxic principles

ASPCA, as published: Unknown Source

Clinical signs

ASPCA, as published: Dogs: moldy nuts/hulls can cause tremors and seizures, ingestion of shavings can cause incoordination; Horses: laminitis, colic Source

Last verified (ASPCA record): 2026-10-27. Source access dates and limitations.