While mild stomachaches may be experienced when ingested, there is no known species of orchid that has been proven fatal to cats. The ASPCA has determined that orchids are non-toxic plants safe for households with feline members.
Since cats' digestive systems are not made to handle plants, a cat that ingests an orchid may vomit or have diarrhea. This stomachache is a brief event and the cat generally avoids ingesting the plant after experiencing it. For stubborn cats that continue to bother with household orchids, owners must redirect the cat with new toys or treats to take attention away from the plant. Storing the orchid in a place where it cannot be accessed is an ideal way to prevent the cat from ingesting the plant.