Rhubarb

poison-control

Toxic to Dogs, Toxic to Cats, Toxic to Horses

Source checked 2026-10-27

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.

Rhubarb

Source checked 2026-10-27

rescue-education

WHRS Class 2: local or weaker toxin · Wisconsin House Rabbit Society chapter list (G. Flentke, 2012): Class 2 — "Local toxins": "Allergens, dermal sensitivity toxins, or systemic toxins of lesser strengths" (list heading: "May cause allergic reaction in rabbits. Be cautious."). WHRS adds that, because rabbits inevitably chew items, these toxins "could be more of a problem than the current literature indicates".

Rhubarb

Source checked 2026-10-27

veterinary-reference

Oxbow: on the "never feed" list · Oxbow Animal Health "foods guinea pigs should never eat" (veterinary-reviewed article from a pet-food maker, not a poison-control centre).

Rhubarb contains a high concentration of oxalic acid which, if consumed in high quantities, can interfere with calcium absorption and have other toxic effects.

Source checked 2026-10-27 (source updated September 5, 2025)

veterinary-reference

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

Other commonly seen plants that are toxic include Lantana, lilies of the valley, lilies, rhubarb, dumb cane, and umbrella plant.

Source checked 2026-10-27

veterinary-reference

VCA: on the may-be-poisonous list (not specifically reported) · VCA: on the list of "many plants which may be poisonous to birds, although it is not exhaustive"; no asterisk, so not specifically reported harmful in birds. VCA notes information is often inferred from other species.

Rhubarb

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

specialist-charity

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

Rhubarb (leaves)*

Source checked 2026-10-27

No evidence collected in this database yet for: Hamsters, Rats, Mice, Chinchillas, Ferrets, Parrots (macaws, Amazons, African greys…), Budgerigars (budgies), Cockatiels, Lovebirds, Canaries, Finches, Pigeons & doves, Bearded dragons, Iguanas, Goats, Chickens & other poultry

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