Dreamcatcher Alpacas
Plant safety · Toxic

Is Milkweed Poisonous to Alpacas?

Milkweed (Asclepias spp.) — a wild plant. Here is what alpaca owners need to know.

Updated 2026-10-02By the Dreamcatcher Alpacas editorial team
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Yes — milkweed is toxic to alpacas.

Keep it out of pastures, hay and reach of fences, and never feed trimmings.

Milkweed (Asclepias spp.)
Milkweed (Asclepias spp.). Photo: Hardyplants at English Wikipedia, Public domain via Wikimedia Commons.
Status
Toxic
Scientific name
Asclepias spp.
Family
Apocynaceae
Plant type
Wild plant
Also known as
Butterfly weed
Toxic parts
Leaves and stems; narrow-leaved species most toxic; remains toxic in hay
Toxic compound
Cardenolides (cardiac glycosides)

Why it matters

Important for monarch butterflies, so plant it outside alpaca fencing rather than inside.

Signs of milkweed poisoning in alpacas

  • Sudden death (often the first sign)
  • Slow, irregular or very fast heartbeat
  • Weakness, trembling, collapse
  • Diarrhea and colic
  • Cold extremities
  • Seizures (narrow-leaved species)

Signs can appear within minutes (cyanide, cardiac toxins) or only after weeks of exposure (liver toxins). Many poisoned camelids are simply found dead, so prevention is everything.

What to do if your alpaca ate milkweed

  1. Move the herd away and remove any remaining plant material, clippings or fallen leaves.
  2. Call your veterinarian immediately, even if the alpaca looks normal. Say what was eaten, roughly how much and when.
  3. Bring a sample or clear photo of the plant to help identification.
  4. Do not give home remedies, oils or try to make the alpaca vomit unless your vet tells you to.
  5. Keep the animal quiet, in shade or shelter, with water available. Write down the time and every symptom you see.
  6. Check every other alpaca that had access, then remove the plant permanently (including roots).

Emergency: call your veterinarian immediately. If you cannot reach them, contact an animal poison control service (in the U.S., the ASPCA Animal Poison Control Center or Pet Poison Helpline; fees may apply). Bring a sample or photo of the plant.

About the plant

Asclepias is a genus of herbaceous, perennial, flowering plants known as milkweeds, named for their latex, a milky substance containing cardiac glycosides termed cardenolides, exuded where cells are damaged. Most species are toxic to humans and many other species, primarily due to the presence of cardenolides. However, as with many such plants, some species feed upon milkweed leaves or the nectar from their flowers. A noteworthy feeder on milkweeds is the monarch butterfly, which uses and requires certain milkweeds as host plants for its larvae.From Wikipedia — “Asclepias”, licensed under CC BY-SA 4.0.

Where it grows

GBIF, the Global Biodiversity Information Facility, holds 635,594 recorded observations of Asclepias L. worldwide, including 480,902 in the United States. It belongs to the Apocynaceae family, together with Oleander, Yellow Oleander, Dogbane. See the occurrence map on GBIF.

Frequently asked questions

Is milkweed poisonous to alpacas?
Yes. Yes — milkweed is toxic to alpacas. Important for monarch butterflies, so plant it outside alpaca fencing rather than inside.
What part of milkweed is toxic to alpacas?
Leaves and stems; narrow-leaved species most toxic; remains toxic in hay.
What are the symptoms of milkweed poisoning?
Sudden death (often the first sign), slow, irregular or very fast heartbeat, weakness, trembling, collapse, diarrhea and colic, cold extremities and seizures (narrow-leaved species).
Is dried milkweed safe?
No — the toxin in this plant remains active when dried, so contaminated hay and dried clippings are still dangerous.

Keeping pastures safe

  • Walk every paddock and fence line each season and remove toxic plants, including roots.
  • Never throw garden, hedge or lawn clippings over the fence.
  • Check pastures after storms for fallen branches (cherry, red maple).
  • Buy hay from known sources and inspect it for weeds.
  • Keep pastures well managed — hungry alpacas eat plants they would normally avoid.

Browse the full toxic plant checker, the printable list of poisonous plants and the list of safe plants.

This page is educational and does not replace advice from a veterinarian who has examined your animals. Camelid medicine uses many drugs “extra-label”, so dosing must come from your vet. In an emergency, call your vet first. Read our disclaimer · How we write and review content.

Data: plant status compiled from veterinary toxicology references (see sources); taxonomy and occurrences from GBIF; identifiers from Wikidata Q162153.