A shamrock plant is poisonous to cats, especially the Oxalis spp.
Shamrock plants and especially the Oxalis spp contains soluble oxalates which include oxalic acid, that can be harmful to cats if ingested.
The compounds can disrupt the calcium levels in the cats body and cause serious health issues including renal failure in cats.
Shamrock plants are also toxic to dogs so dogs and cats should not be allowed to chew on or eat any part of the shamrock plant.
Symptoms of shamrock poisoning in cats and dogs include.
Drooling, diarrhea, vomiting, lethargy, weakness, tremors and even changes in thirst or urination.
If your cat or dog has ingested any part of the shamrock plant you should seek immediate veterinary care if possible.
The oxalis triangularis is the purple shamrock plant and is a common household plant that is toxic to dogs and cats and even in small amounts the shamrock plant can cause poisoning and death in cats and dogs so it's best to keep the shamrock plants out of reach of dogs and cats.
If your cat or dog ingests a shamrock plant, you should if possible remove any visible plant material from their mouth if safe to do so.
And call the vet or a pet poison control center immediately if you suspect your dog or cat has shamrock poisoning.