HOLLY
Causes irritation of the mouth, gastrointestinal upset (vomiting and diarrhea)
drooling. and diarrhoea. It may also cause excessive head-shaking if consumed in large quantities.
MISTLETOE
Even small quantities can cause gastrointestinal irritation, and vomiting and abdominal pain. Serious effects include an abnormal heart rate, low blood pressure and lack of coordination.
POINSETTIAS
Sap from the leaves contains a chemical which can cause nausea, vomiting, drooling and diarrhoea.