Is sorrel toxic to dogs?

The ASPCA lists sorrel as toxic to dogs because of soluble oxalates. Small exposures typically cause only stomach upset — the serious effects on calcium levels and kidneys come from very large or repeated ingestion.

My dog ate a sorrel leaf from the garden. Should I worry?

A stray leaf is almost always harmless — at most some drooling or a brief upset stomach. Just don't let leaf-grazing become a habit, since oxalate damage builds with repetition.

Can dogs have sorrel soup (szczawiowa)?

No. The soup concentrates a large amount of sorrel per serving and typically adds cream, salt and often onion. It's the exact "quantity plus extras" combination the caution exists for.

What do oxalates actually do to dogs?

Soluble oxalates bind calcium in the blood; in big doses that can cause weakness, tremors and heart rhythm problems, and the resulting crystals can injure the kidneys. That's a massive-exposure scenario, not a one-leaf one.

Can Dogs Eat Sorrel? Vet-Sourced Answer

Can Dogs Eat Sorrel?

Feed with caution

Mostly avoid. A stray sorrel leaf only risks mild stomach upset, but the leaves are high in soluble oxalates — regular or large amounts are a real problem.

Quick facts

Quick facts
Verdict	Caution
Risky amount	No safe or toxic dose is established — treat any amount as a risk.
Key symptoms	Vomiting, Diarrhea, Drooling, Weakness or muscle twitching (massive or chronic ingestion)
What to do	One leaf is not an emergency. If your dog grazed heavily on sorrel or eats it regularly and shows weakness, tremors or unusual urination, call your vet promptly.

Why sorrel sits on the caution list

Sorrel’s signature lemony tang comes from oxalic acid, and the leaves carry enough soluble oxalates that the ASPCA lists the plant as toxic to dogs. The dose is everything: a small exposure typically means nothing worse than an upset stomach, while very large or chronic ingestion can bind blood calcium — causing weakness, muscle twitching, even heart rhythm problems — and the resulting crystals can injure the kidneys. It’s the same chemistry that makes rhubarb leaves dangerous, in a milder package.

A leaf vs. a habit

One stolen leaf from the garden is a shrug. The realistic risks look different: a dog that grazes the sorrel patch daily, or one that gets a bowl of sorrel soup. Szczawiowa concentrates far more leaf per serving than a dog would ever nibble, then adds cream, salt and usually onion on top. That habit — not the stray leaf — is what the caution verdict is about.

If your dog genuinely likes sour, leafy things, occasional spinach or kale carries a milder version of the same oxalate math. After a heavy sorrel raid, watch for vomiting, weakness or tremors and call your vet if they appear.

If your dog ate it

One leaf is not an emergency. If your dog grazed heavily on sorrel or eats it regularly and shows weakness, tremors or unusual urination, call your vet promptly.

In the US you can also call the ASPCA Animal Poison Control Center at (888) 426-4435 (a consultation fee may apply).

Frequently asked questions

Is sorrel toxic to dogs?: The ASPCA lists sorrel as toxic to dogs because of soluble oxalates. Small exposures typically cause only stomach upset — the serious effects on calcium levels and kidneys come from very large or repeated ingestion.
My dog ate a sorrel leaf from the garden. Should I worry?: A stray leaf is almost always harmless — at most some drooling or a brief upset stomach. Just don't let leaf-grazing become a habit, since oxalate damage builds with repetition.
Can dogs have sorrel soup (szczawiowa)?: No. The soup concentrates a large amount of sorrel per serving and typically adds cream, salt and often onion. It's the exact "quantity plus extras" combination the caution exists for.
What do oxalates actually do to dogs?: Soluble oxalates bind calcium in the blood; in big doses that can cause weakness, tremors and heart rhythm problems, and the resulting crystals can injure the kidneys. That's a massive-exposure scenario, not a one-leaf one.