Can dogs eat broccoli?

Broccoli isn't toxic to dogs, and in small portions it's a healthy vegetable rich in fiber and vitamin C. In larger amounts, though, isothiocyanates and the high fiber content easily cause bloating and digestive upset. Here's how much broccoli is still fine.

Why only in moderation

Broccoli is a cruciferous vegetable, like cauliflower or cabbage. It doesn't contain anything directly toxic, but it does contain isothiocyanates, compounds that in larger amounts irritate the stomach and intestines and can cause vomiting or diarrhea.

In small portions, broccoli provides fiber, vitamin C, vitamin K, and antioxidants, and many veterinary sources consider it a fine addition to the diet as long as it doesn't make up more than about a tenth of daily food intake.

The tough stalks are harder to digest and pose a choking risk for smaller dogs, so it's best to chop them into smaller pieces or skip them and use just the florets.

Both raw and cooked broccoli are fine; what matters is leaving out the butter, cheese, cream sauce, or dressing that broccoli is often served with for people, all of which are unsuitable for dogs because of the fat and salt.

Frozen broccoli without additives is just as suitable as fresh; simply thaw it or blanch it briefly before serving. Frozen mixes with sauce or cheese aren't appropriate, and neither is broccoli microwaved with seasoning.

How to serve broccoli

• Small florets, raw or briefly boiled or steamed, with no salt, oil, or seasoning.
• Chop the stalks into smaller pieces or skip them; they're tougher and harder to digest.
• Never serve broccoli in cheese sauce, cream sauce, or dressing.
• Introduce it gradually in small pieces and watch how your dog handles the gas.
• Frozen broccoli just needs thawing or a quick blanch, no special preparation required.

Risks

• Isothiocyanates in larger amounts irritate the digestive tract and can cause vomiting or diarrhea.
• The higher fiber content easily causes gas and bloating, especially the first time.
• Tough stalks are harder to digest and pose a choking risk for small breeds.
• Broccoli served in cheese, cream, or oil-based sauce is unsuitable because of the fat and salt.

Symptoms to watch for

• Bloating and gas
• Looser stools or diarrhea
• Vomiting after a larger amount
• Abdominal pain, restlessness

Your dog already ate broccoli. What now?

1. A small amount of plain broccoli usually causes nothing worse than temporary gas, so just keep an eye on things.
2. After a larger portion, watch your dog for 24 hours for vomiting or diarrhea.
3. If your dog ate broccoli with cheese sauce, butter, or dressing, watch for digestive upset linked to the higher fat content, and contact your vet if symptoms persist.