Oleander

poison-control

Toxic to Dogs, Toxic to Cats, Toxic to Horses

Source checked 2026-10-26

rescue-education

rabbit.org: listed as poisonous (not graded) · rabbit.org list "Poisonous Plants" (compiled by the University of Illinois): plants "normally thought to be poisonous"; "others may cause a reaction in some but not in others". Not a graded risk.

Oleander

Source checked 2026-10-27

rescue-education

WHRS Class 1: universal toxin · Wisconsin House Rabbit Society chapter list (G. Flentke, 2012): Class 1 — "Universal species toxins": "usually systemic toxins or local effect toxins of sufficient intensity to cause systemic problems" (list heading: "Do NOT expose rabbits to these plants.").

Oleander

Source checked 2026-10-27

university

UC Davis Toxic Plant Garden entry: Oleander (Nerium oleander)

Toxic to cats, dogs, horses, cows, sheep, goats, rabbits, birds

Source checked 2026-10-27

veterinary-reference

AAV: listed as toxic to pet birds · AAV leaflet "Protecting Your Pet Birds From Household Dangers" (the list "is not exhaustive").

Plants known to cause damage to the heart include oleander, yew, lily of the valley, and foxgloves.

Source checked 2026-10-27

peer-reviewed

Review section "Toxic plants (miscellaneous)" on pet birds.

Many ornamental plants are toxic, such as Coronilla varia, Ericaceae family (for example Rhododendron spp.), Kalanchoe spp., Nerium oleander, Taxus media, Digitalis purpurea, and Euphorbia pulcherima (81).

Source checked 2026-10-27

veterinary-reference

VCA: specifically reported harmful in birds · VCA: asterisk = "plants that are specifically reported to be harmful in birds".

Oleander*

Source checked 2026-10-27 (source updated Aug 14, 2026)

peer-reviewed

Table 2, "Some plants are toxic to pet birds" (C = clinical report, E = experimental). Basis: experimental.

Oleander | Budgerigars Canaries (E)

Source checked 2026-10-27

peer-reviewed

Peer-reviewed experiment (PMID 1577644) · fresh plant material (powdered) · Pairs of budgerigars were given powdered fresh plant material by gavage; of 19 plants tested only 6 induced clinical signs of illness. The abstract does not name the other 13 plants, so it supports no safe/non-toxic claim for any plant.

Of the 19 plants tested, only 6 induced clinical signs of illness; these plants included yew, oleander, clematis, avocado, black locust, and Virginia creeper (Taxus media, Nerium oleander, Clematis sp, Persea americana, Robinia pseudoacacia, Parthenocissus quinquefolio).

Source checked 2026-10-27

peer-reviewed

Peer-reviewed experiment (PMID 1601714) · leaves or fruit · Leaves or fruit of 14 plants were given by gavage to 15 pairs of canaries (0.12-0.70 g each).

Of the plants tested, 5 (oleander, lupine, foxglove, yew leaves, and dieffenbachia) were considered highly toxic and were associated with acute death of birds.

Source checked 2026-10-27

specialist-charity

Tortoise Trust: listed as toxic, credible mortality reports (*) · Tortoise Trust toxic-plant list (from Highfield, The Tortoise and Turtle Feeding Manual, 2001): marked * = "credible cases where mortality has been reported following consumption".

Oleander*

Source checked 2026-10-27

specialist-charity

Tortoise Trust article text: green iguanas died after consuming azalea and oleander.

tortoises have died as a result of eating daffodils and green iguanas have died after consuming azalea and oleander

Source checked 2026-10-27

university

Cornell: listed for this species · all, leaves, stems · Cornell lists Nerium oleander; parts poisonous: all, leaves, stems; poison: nerioside, oleandroside, saponins, cardiac glycosides.

Nerium oleander | Oleander | horses, cattle, sheep, dogs, humans, goats | all, leaves, stems | nerioside, oleandroside, saponins, cardiac glycosides

Source checked 2026-10-27

peer-reviewed

Peer-reviewed experiment (PMID 21576188) · dried leaves · 20 healthy male broiler chickens given dried oleander leaves, single dose 500 mg/kg.

Clinical signs of toxicosis began to appear about 1 h after receiving the oleander and included hypersalivation, vomiting, diarrhea, deep depression, and sudden death.

Source checked 2026-10-27

No evidence collected in this database yet for: Guinea pigs, Hamsters, Rats, Mice, Chinchillas, Ferrets, Parrots (macaws, Amazons, African greys…), Cockatiels, Lovebirds, Finches, Pigeons & doves, Bearded dragons

No supported claim has been collected for these animals. Not listed does not mean safe; do not infer suitability from another species.