Is Parsley safe for dogs?

Yes, parsley (Petroselinum crispum) is considered toxic to dogs. It contains furanocoumarins and psoralens that can cause photosensitivity reactions, particularly affecting skin exposed to sunlight after ingestion.

The most distinctive reaction is photosensitization: red, sunburn-like skin on lightly pigmented or thinly furred areas such as the belly, ears, muzzle, and around the eyes, sometimes progressing to dermatitis or blistering. Mild GI upset like vomiting or soft stool can also occur. Importantly, the skin reaction only develops after ingestion combined with UV exposure — it won't appear if your dog stays out of sunlight.

Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435. Keep your dog out of direct sunlight for at least 24 hours to reduce the risk of photosensitization. Seek a same-day vet appointment if you notice red, irritated, or blistering skin after your dog has been outside, or if they vomit repeatedly or refuse to eat.

Parsley contains psoralens and furanocoumarins — compounds that sensitize skin cells to UV light. After a dog ingests enough parsley, these chemicals are absorbed into the body and concentrate in the skin; when UV rays then hit those areas, an exaggerated inflammatory response occurs, producing sunburn-like lesions. The reaction preferentially affects areas with thin fur or little pigmentation, such as the belly, ears, and muzzle.