After an unseasonably warm winter, many gardens and yards around the country are growing and blossoming well ahead of schedule. Outdoor enthusiasts who are also pet owners are delighted with the early onset of spring, enjoying their outdoor living spaces while watching their pets run and play. The veterinary and toxicology experts at Pet Poison Helpline would like to keep pets safe this spring and summer by informing pet owners of potentially harmful substances, flowers and plants that are dangerous to dogs and cats.
“Many of the calls that we receive at Pet Poison Helpline this time of year involve pet ingestions of yard and garden products that may have harmful chemicals or ingredients,” said Ahna Brutlag, DVM, MS, assistant director at Pet Poison Helpline. “Additional yard-related emergencies involve pets that have dug into and ingested the contents of compost piles, or consumed various plants and flowers that can be poisonous.”
Some of the most common potentially harmful dangers for pets that reside in many yards and gardens are listed below.
Cocoa bean mulch is made of discarded hulls or shells of the cocoa bean, which are by-products of chocolate production. The tempting “chocolate-like” smell often attracts dogs and may encourage them to eat the mulch. Processed cocoa bean hulls can contain theobromine and caffeine, the two toxins of concern in chocolate. Unfortunately, determining the amount of toxins in mulch can be difficult as it varies greatly from product to product. Many varieties contain very low amounts of the toxins and are not as dangerous as dog owners are often led to believe; however, varieties with higher toxin concentrations can cause vomiting, diarrhea, hyperactivity, an abnormal heart rhythm, seizures and in extreme cases, death. Since it is not usually apparent how much of the toxin the mulch contains, it’s best to keep dogs a safe distance away, to always supervise your pet while outside, or to not use the mulch at all.
Fertilizers, Soil Additives and Pesticides
While fertilizers are typically fairly safe for pets, those that contain blood meal, bone meal, feather meal and iron may be especially tasty – and dangerous to dogs. Large ingestions of the meal-containing products can form a concretion in the stomach, potentially obstructing the gastrointestinal tract and causing severe pancreatitis, and those that contain iron may result in iron poisoning. Also, ingestion of pesticides and insecticides, especially if they contain organophosphates (often found in systemic rose care products), can be life-threatening, even when ingested in small amounts.
Slug and Snail Baits
Available in a variety of forms (pellets, granular, powder and liquid), slug and snail baits contain the active ingredient metaldehyde, which is highly poisonous to dogs and cats. When ingested, metaldehyde produces clinical signs of distress within one to two hours, including salivation, restlessness, vomiting, tremors, seizures, and life-threateningly high body temperature. These baits are highly toxic and without immediate veterinary attention, symptoms can last for several days and can be fatal.
Gardeners love their compost; however, it can be toxic to pets and wildlife so please keep it fenced off. As the organic matter decomposes, it is common for molds to grow, some of which produce hazardous tremorgenic mycotoxins. When consumed by an animal, moldy food or compost ingestion can result in sickness and physical distress in as little as 30 minutes. Symptoms include agitation, panting, drooling, vomiting, tremors and seizures. Prompt veterinary treatment with appropriate supportive care usually results in a good prognosis.
Flowers and Plants
Some of the most dangerous spring and summertime threats to pets in the yard are common flowers and plants.
Sago Palm: Popular in warmer climates, this outdoor and indoor plant can be extremely harmful to pets. All parts of the plant, including the fronds/leaves, nuts and seeds are especially poisonous to dogs. Ingesting even a small amount can cause severe vomiting, bloody stools, damage to the stomach lining, severe liver failure and, in some cases, death. This plant is considered one of the most deadly in dogs and long-term survival is poor; only 50% of dogs who ingest is often survive this dangerous plant, even with veterinary treatment. Without treatment, sago palm poisoning can result in severe, irreversible liver failure. Prompt treatment is always needed for the best prognosis.
Lily of the Valley: An early springtime favorite, the Lily of the Valley (Convallaria majalis) contains cardiac glycosides, which are also used in many human heart medications. When eaten by dogs or cats, this common perennial can cause vomiting, diarrhea, a drop in heart rate, severe cardiac arrhythmias, and possibly seizures. Any pet with a known exposure should be examined and evaluated by a veterinarian and treated symptomatically.
Crocuses: There are two types of crocus plants: one blooms in the spring and the other in the fall. The spring plants (Crocus spp.) are more common and cause only gastrointestinal upset accompanied by vomiting and diarrhea in dogs and cats. However, the fall crocus (Meadow Saffron or Colchicum autumnale) is highly toxic and can cause severe vomiting, gastrointestinal bleeding, and multisystem organ failure with bone marrow suppression. Symptoms may be seen immediately but can be delayed for days. If you witness your pet eating a crocus and you are not sure what variety it is, seek veterinary care immediately.
Lilies: Cat owners beware of lilies! While some types, such as the Peace (Spathiphyllum spp.), Peruvian (Alstroemeria spp.) and Calla (Zantedeschia spp.), cause only minor symptoms when eaten, other varieties of the true lily family (Lilium and Hemerocallis species) are deadly and highly toxic to cats, including Tiger, Asiatic, Easter, Japanese Show and Day lilies. Ingesting very small amounts – eating as little as two petals or leaves, or exposure to the pollen – can result in severe kidney failure. Even the water in a vase containing true lilies is considered highly poisonous, as the toxin in the plant is water-soluble. If a cat consumes any part of these lilies, he or she needs immediate veterinary care to prevent kidney failure.
While enjoying the beautiful gardens and flowers this spring and summer, have the knowledge to keep your pets safe. If, however, you think a pet may have ingested something harmful, take action immediately. Contact your veterinarian or Pet Poison Helpline at 1-800-213-6680.