Is Nepenthes rajah toxic to cats?

No — nepenthes rajah is listed by the ASPCA as non-toxic to cats. It is a sensible choice for a home with a cat; a curious nibble will not poison them, though no plant is meant to be eaten. Nepenthes is not individually listed in the ASPCA database, but the related carnivorous pitcher plant Darlingtonia californica (family Sarraceniaceae) is ASPCA-listed as non-toxic to cats, dogs, and horses, and carnivorous-plant horticultural consensus reports no demonstrated toxicity. Pitcher fluid contains only mild digestive enzymes and may cause minor, self-limiting stomach upset if chewed. Treat as low-risk but keep out of reach and verify with a vet if a pet ingests pitcher fluid.

Yes — the ASPCA lists nepenthes rajah as non-toxic to cats and dogs. A cat that chews a large amount of any foliage can still get a mild, brief stomach upset, so discourage grazing, but it will not be poisoned.

The ASPCA classification Growli uses applies to both cats and dogs: Nepenthes rajah is non-toxic to dogs as well. See the full nepenthes rajah pet-safety guide for both species.

Reliable ASPCA non-toxic picks for a cat home include spider plant, calathea, parlor palm, peperomia, and most true ferns. Browse the best cats-safe plants list to check more before you buy.