Unfortunately, they may also be hazardous to your pets if proper precautions are not followed. Poinsettia - This plant is considered to be low in toxicity. However, if large amounts of the leaves are chewed, irritation of the mouth, throat, and gastrointestinal tract may occur, leading to vomiting, diarrhea, and abdominal pain. If your animals tend to eat plants, keep poinsettias well out of reach. Holly and Mistletoe - These plants are highly toxic, especially the berries, and are not recommended to be kept in an area where animals may get to them.
Plastic replacements are available and are recommended instead.
Christmas trees - Most Christmas greens are relatively low in toxicity. However, ingestion of fallen and dried needles can result in trauma to the mouth and gastrointestinal tract. Therefore, keep needles picked up as they fall. Avoid using Japanese yew, a common outdoor evergreen with red berries, for holiday greenery as it is very toxic to animals if ingested. Access by pets to Christmas tree water should be limited as there may be heavy growth of bacteria in the water that could cause vomiting and diarrhea.