Raisins
Toxic
Fruits
Raisins pose a serious toxic risk to birds and should never be offered as a treat or food supplement. While the exact mechanism in avian species is not as thoroughly documented as in dogs, raisins contain concentrated compounds — including high sugar loads, possible mycotoxins, and an unidentified nephrotoxic principle — that can overwhelm a bird's extremely sensitive and small-volume metabolic systems. Avian veterinarians consistently advise against feeding any grape-derived product, including raisins, to pet or wild birds.
Clinical note: Potential nephrotoxin with compounding osmotic and hepatic risk in small avian patients.