Orchids are generally not toxic to cats. Most common orchid species such as Phalaenopsis (moth orchids), Cymbidium, Dendrobium, and Oncidium are considered safe for cats and are unlikely to cause serious harm if ingested. However, nibbling on orchids may cause mild digestive upset such as slight vomiting or diarrhea in some cats. The greatest risk often comes from chemical treatments on the plants, like pesticides or fertilizers, rather than the orchids themselves. To keep cats and orchids safe, it is recommended to place orchids out of a cat's reach and consider natural deterrents. Providing alternative plants like cat grass can also help divert their attention from orchids. In summary, orchids are safe for cats but nibbling should be discouraged to avoid mild stomach upset or damage to the plants.