
1. Seasonal plants. The leaves of mistletoe and poinsettias can cause stomach upset and irritation. Lilies are often overlooked and are particularly harmful to cats. Lilies cause acute renal failure with ingestion of any part of the plant, including the pollen.
2. Christmas trees. Many pets drink Christmas tree water that contains fertilizers and bacteria, leading to stomach upset. Christmas trees needles can cause stomach upset and irritation. Ensure your pets are well supervised and restrict access to the Christmas tree water.