Click here to learn more.
Many common plants, both in the house and the yard, can be toxic to our pets, including some that can still be found this time of year, either because they are being brought in from outside or because they are popular in holiday displays or decorations. Some toxic plants only cause mild stomach upset, while others can be poisonous. To make things even more confusing, some plants are safe for some species while deadly for others. As a pet owner, it is important that you be familiar with the most dangerous of the toxic plants.
Sago palms (Cycas and Macrozamia spp.) can be found as outdoor ornamental plants in warm climates or as houseplants in cooler climes. Ingestion of sago palm plants can cause liver failure and death in dogs and cats. All parts of the plant are toxic, with the seeds having the highest concentration of toxin. One seed can kill a dog. Vomiting usually begins within 24 hours, and animals become depressed and may start to seizure. This plant is one of the most toxic, with a mortality rate of around 30 percent.
Members of the true lily family (Lilium and Hemerocallis) have been shown to cause kidney failure in cats. Some examples of true lilies include Easter lilies (L. longiflorum), tiger lilies (L. tigrinum), rubrum or Japanese showy lilies (L. speciosum, L. lancifolium), and day lilies (H. species). Even a small amount of exposure (a few bites on a leaf, ingestion of pollen, etc.) may result in kidney failure. Cats often vomit within a few hours of exposure and stop producing urine within 72 hours. Cats who receive quick treatment (intravenous fluids for two days) have a good prognosis. Lilies are common in holiday flower bouquets and arrangements, as are popular lily-like holiday flowering bulbs, such as amaryllis, which can also be toxic to pets.
Plants containing cardiac glycoside include oleander (Nerium oleander), foxglove (Digitalis purpurea) and lily of the valley (Convallaria majalis). These glycosides slow down the heartbeat and can even stop it. These plants are toxic in all species. These are typically outdoor/landscape plants, but the popular and beloved lily of the valley is a common bouquet flower for winter arrangements, weddings and other holiday gatherings.
Grayanotoxins (andromedotoxins) can cause vomiting, seizures and cardiac arrest. Sources include rhododendrons, azaleas (Rhododendron spp.), laurels (Kalmia spp.) and Japanese pieris (Pieris spp.). These are typically outdoor plants, but they are highly toxic in all species and deserve extra caution.
Yews are commonly used as landscaping plants as they stay green year-round. A pet looking for a bit of winter green may be tempted to take a nibble. Yews contain compounds that have a direct action on the heart. The toxins can cause an irregular heartbeat or even stop the heart. All parts, except for the ripe berry (the fleshy red structure surrounding the seed), are toxic. Sudden death can occur within hours of ingestion.
Ricinus communis (commonly known as the castor bean) contains ricin, which can be highly toxic. Ricin causes multiple organ failure. Ricin is found throughout the plant, but the highest levels are found in the seeds. The seed coat must be damaged to release the toxins, so animals who swallow the seeds whole may not get sick. The mortality rate in dogs is about 9 percent. These beans are also commonly used in many rustic-type ornaments and jewelry.
Autumn crocus (Colchicum autumnale) contains chemotherapy-like compounds that attack rapidly dividing cells in the body. Ingestion can cause vomiting, diarrhea, weakness and possible death. Do not confuse this flower with the innocuous spring crocus (Crocus spp.), which is not toxic.
Hops are used in beer brewing, so home brewers need to be aware of this toxic plant. Ingestion of hops (Humulus lupulis) by dogs causes their body temperature to skyrocket. Signs can be seen within hours. Dogs become agitated and begin to pant. Their body temperature can get high enough to kill them — up to 108 degrees Fahrenheit.
More From Vetstreet
See your veterinarian immediately if you suspect that your pet has ingested any of these highly toxic plants!
More on Vetstreet.com:
Like this article? Have a point of view to share? Let us know!
Thank You For Signing Up
for the Petwire newsletter, sending you all the pet news each week directly to your inbox.
Get the latest pet news, tips, tricks, and expert advice sent right to your inbox!
For the next four days, patrons of the café will be able to meet 16 adoptable kitties as they sip on espresso…
The last Friday in April is dedicated to undigested cat fur. To celebrate, we found photos of the cutest kitties…
A new film features 11-year-old Cory Gould, who has Asperger syndrome, and his incredible knowledge of dog breeds.
Disco, who knows more than 80 phrases, songs and sounds, is a YouTube star who's beloved around the world.
We polled Vetstreet readers and veterinary professionals to see if they drift off to sleep with their cat or dog…
Want to make some enemies in your vet’s waiting room? This funny new video from Dr. Andy Roark shows you how.
The silky-coated Burmese is a compact but heavy feline who loves to show off his impressive athletic skills.
If the video doesn't start playing momentarily,
please install the latest version of Flash.