Can dogs eat broccoli?
✓ Reviewed against PDSA, Blue Cross & Animal PoisonLine guidance · Last updated: 2026-06-17
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The full picture
Broccoli is technically safe but should be treated carefully. The florets contain compounds called isothiocyanates, which are mildly irritating to a dog's gastrointestinal tract. A small amount causes no problems, but broccoli making up more than 10% of a dog's diet can cause real issues. Stems are a choking hazard for smaller dogs. Plain steamed or raw broccoli in small amounts is the safest way to offer it. Never in cheese sauce.
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
- Gastrointestinal irritation from isothiocyanates
- Choking on stems
- Gas
Potential benefits
- Fiber
- Vitamin C and K
- Antioxidants
Safe portion size
A small floret for a medium dog, occasionally.
Safer alternatives
- green beans
- carrots
- cucumber
Why only small amounts?
Broccoli florets contain isothiocyanates, which can cause mild gastric irritation in larger quantities — this is why "small amounts" is the standard guidance rather than a hard toxicity limit. The stalks are tougher and can pose more of a choking risk than the florets, particularly for smaller dogs, so chopping them small is worth the extra step.
Does size or breed matter?
The irritation risk scales with quantity relative to body size, so small dogs reach the "too much" threshold from a smaller absolute amount than large dogs. No specific breed sensitivity beyond this.