Iris

Symptoms reported in cats

Most serious first.

1. 1
   Vomiting, Nausea, and Diarrhea Not explicitly specified in the provided text (though general plant toxicity symptoms often appear a · These are the most common signs of ingestion. The toxicity is highest in the bulbs, so cats digging up or chewing on rhizomes are at greater risk than those nibbling leaves.
2. 2
   Mouth Ulcers and Oral Irritation Acute (upon contact/ingestion). · Ingestion can cause physical damage and chemical irritation to the mouth, leading to visible sores or ulcers. Drooling (hypersalivation) may occur as a reaction to this irritation.
3. 3
   Abdominal Pain Not explicitly specified. · This pain is likely secondary to the severe gastrointestinal irritation caused by the plant's compounds.Important Distinction: It is crucial to distinguish Iris from True Lilies (Lilium or Hemerocallis species). While Irises cause "extreme discomfort" and gastrointestinal/dermal irritation, they are not noted in the sources to cause the fatal acute renal failure associated with true lilies5,2. However, veterinary attention is still recommended to manage dehydration and pain.
4. 4
   Skin Irritation (Dermatitis) Not explicitly specified. · Contact with the plant sap or parts can cause irritation to the skin, which is a distinct symptom noted for Irises compared to many other toxic plants.

Important notes

Iris (Iris spp.) is a common ornamental flower that is mildly to moderately toxic to cats. The rhizome, which is the thick underground stem, contains the highest amount of irritating compounds. Iris plants contain irisin, iridoid glycosides, and related compounds that can irritate the digestive tract. Leaves and petals can also cause symptoms, but the underground rhizome is usually the biggest risk during digging, repotting, or garden work. If a cat eats iris, possible signs include drooling, vomiting, diarrhea, belly pain, or low energy. Keep rhizomes and plant cuttings away from cats. Call a veterinarian if your cat eats the rhizome, symptoms repeat, or your cat seems very tired.

• Toxic compounds: irisin (resinous glycoside), iridoid glycosides, pentacyclic terpenoids; rhizomes most concentrated
• Mechanism: irisin and iridoid compounds cause direct GI irritation; skin contact with sap may cause dermatitis
• Symptoms: drooling, vomiting, diarrhea, lethargy, abdominal pain; skin or eye contact with sap may cause redness or irritation
• Rhizomes are the most hazardous part — risk increases during planting or dividing bulbs
• Symptoms are usually mild with leaf nibbling; contact your vet if rhizome ingestion is suspected