Cats
UncertainIdentity or evidence quality is not strong enough for a firm answer.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
cat safety reference
Is Macadamia Nut safe for cats?
Macadamia integrifolia
Macadamia integrifolia is a tropical evergreen tree known for producing edible nuts, though the nuts themselves are known to cause specific adverse reactions in dogs. While commonly grown for food production, it is occasionally kept as a specimen plant in warm climates.
Australian NutMacadamia integrifoliaMacadamia Nut TreeQueensland Nut
- Light
- Full sun to partial shade
- Habit
- Tree
- Care
- Moderate
Safety status
What this means for your cat
Cats: keep them away from macadamia nuts. The dramatic hindlimb weakness syndrome is documented in dogs, not cats — but Pet Poison Helpline still treats macadamias as a precautionary toxin for cats, mostly because the high fat content is a real pancreatitis and GI risk and published feline data is too thin to be reassuring.
What to watch for
Vomiting, diarrhea, and signs of abdominal pain (hunched posture, refusing food) from the fat load. Watch for the choking and obstruction risk a whole nut presents to a small mouth, and for any salt-toxicity or chocolate-coated additions if the nut wasn't plain. The classic dog signs (hind-leg weakness, tremors, hyperthermia) are not reported in cats.
Time window
Onset and recovery in cats are not well documented. By analogy with the canine syndrome and with feline dietary indiscretion, GI signs — if they appear — usually show up within 12 hours and resolve within 24–48 hours with supportive care.
When to call the vet
Call a vet or Pet Poison Helpline right away if your cat ate more than a fragment, if the nut was salted, chocolate-coated, or part of a baked good, or if you see vomiting, diarrhea, lethargy, or refusal to eat. Even if your cat seems fine, a same-day call is reasonable because feline pancreatitis can take 24–72 hours to declare itself.
Sources: ASPCA (dogs-only entry), Pet Poison Helpline.
If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.
Cats — concern notes
Common signs
No specific clinical data is available regarding feline ingestion of Macadamia nuts.
Escalation note
Evidence is currently insufficient to determine toxicity in cats; however, owners should prevent ingestion and consult a veterinarian if consumption occurs.
Safer alternatives
No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.
Source evidence
Kew Plants of the World Online
botanical · 95% reliability
Accepted scientific name and botanical distribution for Macadamia integrifolia.
Questions about Macadamia Nut
Are macadamia nuts toxic to cats?
The toxicity of macadamia nuts to cats is currently uncertain — there is no specific clinical data on feline ingestion. While macadamia nuts are well-documented to cause a distinct syndrome in dogs, that reaction has not been reported in cats. Until more is known, treat them as a plant to keep away from your cat.
What symptoms should I watch for if my cat ate a macadamia nut?
Watch for vomiting, diarrhea, and signs of abdominal pain such as a hunched posture or refusing food, which can stem from the nut's high fat content. A whole nut also poses a choking or obstruction risk in a small cat's mouth. The classic dog signs — hind-leg weakness, tremors, and fever — are not reported in cats. GI signs, if they appear, typically show up within 12 hours.
What should I do if my cat ate a macadamia nut?
Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435, especially if your cat ate more than a fragment, if the nut was salted, chocolate-coated, or part of a baked good, or if you notice any vomiting, lethargy, or refusal to eat. Even if your cat seems fine, a same-day call is reasonable because feline pancreatitis can take 24–72 hours to declare itself.
Are the macadamia nuts that affect dogs the same risk for cats?
Not necessarily — the specific mechanism behind macadamia toxicity in dogs is unknown, and that same syndrome has not been documented in cats. However, the high fat content of macadamia nuts can cause GI upset and potentially pancreatitis in cats regardless of any plant-specific toxin. The evidence for cats is currently insufficient to rule out a risk, so preventing ingestion is the safest approach.
Same cat verdict
