Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My dog ate Ambrosia Mexicana - what should I do?
Chenopodium botrys
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Vomiting, lethargy, loss of appetite, and gastrointestinal irritation.
Escalation note
While typically mild, ingestion of significant amounts may cause distress. Consult your veterinarian for guidance if your dog shows signs of illness.
What to watch for
Look for vomiting, loss of appetite, and depression — the three signs ASPCA lists explicitly for this plant. Bigger or more enthusiastic chewers may also show drooling or loose stool as the dose climbs.
Time window
Exact onset and recovery times are not well documented for this plant. Most plant-related GI signs in dogs show up within a few hours; track your dog over the next 24 hours and escalate if anything worsens.
When to call the vet
Call ASPCA Poison Control (888-426-4435) or your vet right away if your dog vomits more than once, won't eat, or seems unusually subdued — and immediately if a large amount was eaten or signs are escalating.
What this means for your dog
Ambrosia Mexicana is on the ASPCA's list of plants toxic to dogs. The same sesquiterpene lactones that bother cats and horses can give a curious dog an upset stomach and a flat mood after a sampling session in the garden.
Sources: ASPCA (no first-aid guidance).
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.