Will My Dog Get Sick If They Eat Milkweed?

by | Last updated on January 24, 2024

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The Pet Poison Helpline reports that

milkweed is a moderate to severe poisoning in dogs and cats

, which means get to the vet as soon as you suspect your pet has ingested the plant, or even butterflies or caterpillars that eat milkweed. Buddy's symptoms were typical for poisoning, but other signs include: Drooling.

What part of milkweed is poisonous to dogs?

This sap contains toxins called

cardiac glycosides or cardenolides

, which are toxic to animals if consumed in large quantities. The good news? Milkweed does NOT taste good. The myth here, is that you shouldn't plant milkweed at all.

Do dogs like to eat milkweed?


If your cat or dog does love to nibble on plants in the yard, milkweed may not be the best choice of plants for your garden

. Finally, milkweed is bitter, so grazing animals are unlikely to eat it unless there is absolutely no other food for them to forage.

How poisonous is milkweed?

All parts of the plant contain toxic cardiac glycosides, which can cause nausea, diarrhea, weakness, and confusion in small amounts, and seizures, heart rhythm changes, respiratory paralysis, and even death in large amounts. Milkweed can also irritate the skin and eyes if touched.

What should I do if my dog eats milkweed?

The Pet Poison Helpline reports that milkweed is a moderate to severe poisoning in dogs and cats, which means

get to the vet

as soon as you suspect your pet has ingested the plant, or even butterflies or caterpillars that eat milkweed.

How do you treat milkweed poisoning in dogs?

Treatment of Milkweed Poisoning in Dogs

Some cases of poisoning with cardiac glycosides will require that your pet undergoes a gastric lavage. Supportive measures for poisonings will usually include

IV fluids for dehydration and combinations of sugars and electrolytes to adjust for any imbalances

.

Is milkweed toxic to animals?

They contain several glucosidic substances called cardenolides that are toxic. Milkweed may cause losses at any time, but it is most dangerous during the active growing season.

Several species of milkweed are poisonous to range animals

. Labriform milkweed (Asclepias labriformis) is the most toxic.

Are monarch butterflies poisonous to dogs?


Monarch butterfly caterpillars eat milkweed, which contains a substance that can poison dogs and harm their hearts

. Other caterpillars like the Slug, Asp and Gypsy moth varieties appear hairy or spiny and can also be toxic to pets, causing intestinal problems and painful internal reactions.

Is narrow leaf milkweed toxic to dogs?


Milkweed poisoning in dogs and cats is thankfully rare, unless your pet is prone to dining on terribly bitter tasting greenery

. Incidents are more common in bona fide grazing animals such as horses, cattle and, more often, sheep.

Is butterfly plant toxic to dogs?

Although butterfly bushes (Buddleja davidii) are not edible, they are no more toxic than any garden plant.

They should be safe to plant where children, dogs, cats, and other animals live

. In fact, butterfly bushes are deer resistant. They attract and feed nectar to hummingbirds and butterflies.

Are dried milkweed pods poisonous?


Milkweeds are most toxic during rapid growth, and retain their even when dried in hay

. Toxicity varies with the species and growing conditions, however all milkweeds should be considered potentially poisonous, especially the narrow-leafed species.

What does the plant milkweed look like?

Milkweed is perhaps most well-known for its seeds; they are

flat, 8 mm long, reddish-brown, and have a pappus of silky hair at one end

. The seeds are borne in narrow teardrop pods that measure between 12 and 37 cm long.

What animals eat milkweed?


Deer and rabbits

have been reported to eat milkweed leaves, and there are many other insects that feed on milkweed such as milkweed bugs, tussock moths, queen butterfly larvae, and more. Nectar and pollen from milkweeds are important food sources for many pollinators, in addition to monarch butterflies.

Why is it harmful for an animal to eat a monarch butterfly?

Adult monarchs retain the toxins, but the obvious coloration of the Monarch butterfly makes it an easy target for a predator such as a bird. If a bird eats a Monarch butterfly,

the toxic plant glycosides stored in the butterfly make the bird sick

.

Is common milkweed edible?


Common milkweed (Asclepias syriaca) is a native edible plant

with tons of uses. You may be most familiar with milkweed for its association with monarch butterflies. Indeed, monarch larvae (caterpillars) eat only plants in the genus Asclepias.

Is milkweed poisonous to touch?

Milkweed species in the genus Asclepias contain cardiac glycosides that are

poisonous to humans

, but they pose the most danger to grazing animals.

Are monarch butterflies poisonous?


The monarch stores a poison called cardenolides, or cardiac glycosides that it gets from the plants it eats

. This poison is similar to digitalis, which can be used to help people with heart problems, but can kill people if they consume too much of it.

How much milkweed is toxic?

Of the two, the neurotoxin is the most lethal. The lethal dose of milkweed varies among species and, to a lesser extent, plant parts, but consuming green plant material in an amount equivalent to

0.005 to 2.0% of the horse's body weight

is considered to be a toxic dose.

Are green caterpillars poisonous to dogs?

Caterpillars are fun to watch and touch, but the ASPCA Animal Poison Control Center warns that

they can be poisonous to pets

. Caterpillars have two types of hair: urticating and stinging.

Can eating a bug make a dog sick?


Your dog can become infected with parasites from eating bugs

. Tapeworm is a very common parasite for dogs and cats. If your dog eats a bug with a flea that is carrying the parasite, he could end up with tapeworms.

Is it bad if my dog ate a moth?

What should I do if my dog eats a mothball? If you think your dog has eaten a mothball,

contact your veterinarian or Pet Poison Helpline* (800-213-6680) right away

. The sooner you seek treatment, the better the chance your dog has of fully recovering.

Diane Mitchell
Author
Diane Mitchell
Diane Mitchell is an animal lover and trainer with over 15 years of experience working with a variety of animals, including dogs, cats, birds, and horses. She has worked with leading animal welfare organizations. Diane is passionate about promoting responsible pet ownership and educating pet owners on the best practices for training and caring for their furry friends.