Sometimes — with care
Yes in small amounts, raw or steamed and plain. Broccoli florets contain isothiocyanates that can irritate a dog’s gut if it becomes a habit in quantity.
Broccoli is rich in fibre, vitamin C and vitamin K and low in calories, making it a legitimate healthy snack. The caveat is dose-dependent: the florets contain isothiocyanates, which in larger quantities cause gastric irritation — the practical rule used by vets is that broccoli should stay under about 10% of daily intake; above 25% it’s considered risky. Stalks are safe but fibrous and a choking hazard if given as large hard chunks.
A floret or two for small dogs, a small handful of chopped florets for large dogs, a few times a week. Steamed plain is gentlest. Skip seasoned, buttered, or garlic-roasted broccoli from your plate.
Green beans give similar nutrition with less gut-irritation potential; cucumber for dieting dogs.
This article is general information, not veterinary advice. If your pet has eaten something potentially harmful or shows symptoms, contact your vet or an emergency clinic immediately. Full disclaimer.