Toxicity to pets

Dogs and cats ingesting shamrock in small amounts can experience immediate oral discomfort and pain along with GI upset and irritation. Signs may be short lived to requiring some supportive care by a veterinarian. Shamrock and sorrel are both oxalis species plants and may be similar in appearance.

Typically, soluble calcium oxalate containing plants cause toxicity in livestock/large animal due to chronic grazing. However, when ingested in large enough quantities in small animals, it can result in poisoning in dogs, cats, and even humans. Clinical signs related to large ingestions or grazing ingestion include salivation, GI upset, neurologic signs, excess thirst and urination, and kidney injury.