Dreamcatcher Alpacas
Plant safety · Toxic

Is Rattlebox Poisonous to Alpacas?

Rattlebox (Crotalaria spp.) — a weed. Here is what alpaca owners need to know.

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

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

Rattlebox (Crotalaria spp.)
Rattlebox (Crotalaria spp.). Photo: Forest & Kim Starr, CC BY 3.0 via Wikimedia Commons.
Status
Toxic
Scientific name
Crotalaria spp.
Family
Fabaceae
Plant type
Weed
Also known as
Crotalaria, Showy rattlebox
Toxic parts
Seeds and leaves
Toxic compound
Pyrrolizidine alkaloids (monocrotaline)
Region
Southeastern U.S.

Why it matters

A legume weed of the southeastern U.S.; seeds rattle in dry pods.

Signs of rattlebox poisoning in alpacas

  • Weight loss and poor condition weeks to months after exposure
  • Jaundice (yellow gums/eyes)
  • Photosensitization (sunburn-like skin lesions)
  • Neurological signs from liver failure: aimless walking, head pressing
  • Death from chronic liver failure

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 rattlebox

  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

Crotalaria is a genus of flowering plants in the family Fabaceae commonly known as rattlepods. The genus includes over 700 species of herbaceous plants and shrubs. Africa is the continent with the majority of Crotalaria species, which are mainly found in damp grassland, especially in floodplains, depressions and along edges of swamps and rivers, but also in deciduous bush land, roadsides and fields. Some species of Crotalaria are grown as ornamentals. The common name rattlepod or rattlebox is derived from the fact that the seeds become loose in the pod as they mature, and rattle when the pod is shaken. The name derives from the Ancient Greek κρόταλον, meaning "castanet", and is the same root as the name for the rattlesnakes (Crotalus).From Wikipedia — “Crotalaria”, licensed under CC BY-SA 4.0.

Where it grows

Main range of concern: Southeastern U.S.. GBIF, the Global Biodiversity Information Facility, holds 241,857 recorded observations of Crotalaria L. worldwide, including 23,336 in the United States. It belongs to the Fabaceae family, together with Rosary Pea, Black Locust, Coffee Senna & Sicklepod, Kentucky Coffeetree, Laburnum. See the occurrence map on GBIF.

Frequently asked questions

Is rattlebox poisonous to alpacas?
Yes. Yes — rattlebox is toxic to alpacas. A legume weed of the southeastern U.S.; seeds rattle in dry pods.
What part of rattlebox is toxic to alpacas?
Seeds and leaves.
What are the symptoms of rattlebox poisoning?
Weight loss and poor condition weeks to months after exposure, jaundice (yellow gums/eyes), photosensitization (sunburn-like skin lesions), neurological signs from liver failure: aimless walking, head pressing and death from chronic liver failure.
Is dried rattlebox safe?
Drying does not reliably make poisonous plants safe. Treat dried leaves and contaminated hay with the same caution.

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 Q311148.