9. Sago palm
Palm trees can be very pretty when used in landscaping, but some people also keep them inside in pots. While you lend a tropical feel to your home, these plants are extremely dangerous. The worst part is that sago palms taste delicious to your pet, so cats and dogs are more likely to bite into one. The seeds are the most dangerous part, but every part of the plant is bad for your pet. Eating it could result in vomiting, bleeding of the stomach, bruising, liver damage and even liver failure resulting in death.