Can dogs eat spinach?
✓ Reviewed against PDSA, Blue Cross & Animal PoisonLine guidance · Last updated: 2026-06-17
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The full picture
Spinach is a classic example of a 'healthy human food' that's a bit complicated for dogs. It's packed with vitamins A, B, C, K and iron — but it's also high in oxalic acid, which binds with calcium and can contribute to kidney damage over time. A small amount as an occasional treat is fine for healthy dogs. Dogs with existing kidney problems should avoid it entirely. Steamed or lightly cooked spinach is easier to digest than raw. Never add butter, salt, garlic, or onion (common pairings in cooked spinach recipes).
If your dog ate more than a safe amount
For a small accidental taste, watch for vomiting, diarrhoea, or signs of discomfort over the next few hours. For a large amount or if your dog is small or has existing health conditions, call your vet. When in doubt, call the ASPCA Animal Poison Control Center on (888) 426-4435.
Risks to watch for
- Oxalates can affect kidneys over time
- Especially problematic for kidney-compromised dogs
- GI upset if eaten in large amounts
Potential benefits
- Vitamins A, B, C, K
- Iron
- Fiber
Safe portion size
A tablespoon of plain cooked spinach occasionally.
Safer alternatives
- Green beans
- Carrots
- Peas
Does size or breed matter?
No specific toxicity concern from spinach itself at any size — this is mainly a portion and preparation question. Always serve plain and cooked or chopped small where relevant, since whole or large raw pieces are a bigger choking risk for small and toy breeds than for large dogs. Introduce any new vegetable gradually, as too much fibre too quickly can cause loose stools regardless of the dog's size.