Is Star fruit (carambola) safe for cats and dogs?
| Species | Verdict |
|---|---|
| Cats | Toxic |
| Dogs | Toxic |
Severity: Severe
Read the full first-aid guide: what to do if your pet ate something toxic
Star fruit, or carambola, has a real home in the continental United States: South Florida. The University of Florida's IFAS Extension notes the tree has been cultivated in the state for more than a century, with commercial production concentrated in Miami-Dade, Lee, Broward, and Palm Beach counties. Early Florida-grown fruit tended to be tart, but growers have since introduced sweeter varieties, and the fruit now shows up at Florida farmers markets and in home landscapes across the southern part of the state.
That sweetness matters for pets, and not in the fruit's favor. Pet Poison Helpline identifies soluble oxalates as the toxic compound in star fruit, found in dangerous concentrations in sour varieties and at lower but still notable levels in sweet ones. In a cat or dog, these oxalates bind calcium in the blood, which can cause a sudden drop in blood calcium and, in some cases, acute kidney injury - a particular danger for pets that already have reduced kidney function.
If a pet eats star fruit or drinks juice made from it, watch for vomiting, drooling, weakness, trembling, or a change in urination, and treat it as urgent if the pet has any history of kidney disease. Call ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661) if the pet shows signs.
Facts and examples
- "Trees were introduced in Florida over 100 years ago," and "in Florida, carambolas are grown commercially in Dade, Lee, Broward, and Palm Beach counties," per UF/IFAS Extension's "Carambola Growing in the Florida Home Landscape" fact sheet (MG269). (source, verified 2026-08-01)
Verdict re-verified against petpoisonhelpline.com, 2026-08-01 — confirmed unchanged. Source
This page is for general information only and is not veterinary advice, diagnosis, or treatment. If your pet is showing symptoms, or you think they ate or touched something dangerous, contact your veterinarian or a pet poison-control hotline immediately.
Last verified 2026-08-01