Yes. Mistletoe is toxic to dogs and cats. Most pets that eat a little just get an upset stomach, but larger amounts can slow the heart and lower blood pressure, so call your vet.
American mistletoe (Phoradendron), the kind the ASPCA lists, contains lectins and phoratoxins, which irritate the gut and in larger amounts can affect the heart. The Pet Poison Helpline says its danger is often exaggerated and most pets recover well, but serious effects are possible after a large meal of leaves or berries. The mistletoe sold in Europe (Viscum album) is a different species; treat it the same way. Mistletoe is often hung with holly, so check what else your pet could reach.
Vomiting and diarrhoea are the most common signs. After larger amounts, watch for weakness, wobbliness, a slow heart rate, difficulty breathing or collapse.
Remove any plant material from your pet's mouth and call your vet or a pet poison helpline, especially if your pet ate berries or more than a leaf or two. Go straight to a vet if your pet seems weak or wobbly, or collapses. Hang mistletoe well out of reach and sweep up any fallen berries.
Data sourced from public ASPCA lists. For general guidance only. If you suspect your pet has ingested something harmful, contact your vet or an animal poison control center immediately. · Privacy Policy