Is Sorrel Toxic to Cats?
Also known as: Garden Sorrel, Common Sorrel, Spinach Dock · Rumex acetosa
What makes it toxic
Soluble calcium oxalates, the same kidney-risk compounds as rhubarb leaves. Absorbed into the blood, they bind calcium and crystallize in kidney tissue; raw leaves are the worst.
Warning signs to watch for
Drooling, vomiting, diarrhea and lethargy within hours. Larger ingestions can lead to tremors, weakness and increased thirst or urination as kidney injury develops over 1–3 days.
What to do if your cat eats it
Remove the plant material and call your vet promptly for any more than a trivial nibble — kidney values should be checked. Tremors, collapse or changes in urination are emergencies.
Common questions
Is one sorrel leaf enough to hurt my cat?
A single small leaf usually causes little more than drooling or a vomit. The real danger comes from cats eating several leaves or repeated grazing.
Is cooked sorrel safer for pets?
No. Cooking reduces some oxalate but not enough to make it safe — never offer sorrel soup or sauces to pets.
Why is sorrel more dangerous than rhubarb stems?
It is not — rhubarb leaves are the toxic part of that plant and carry the same oxalates. Sorrel is basically an all-leaves version of the same risk.
More plants checked for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.