Can dogs eat fennel?
ASPCA lists fennel (Foeniculum vulgare) as non-toxic to dogs. ASPCA rates the risk as low in small amounts in food, but avoid concentrated fennel oil.
How to serve it: unseasoned, cut small, just a little
Good to know: We found no dog source that names fennel as a treat. This rating rests on ASPCA’s plant list.
How much is okay
All treats together: at most 10% of daily calories. Enter your dog’s weight:
Fennel
up to 7.2 oz a day
203 g
10% of 629 kcal a day, for a spayed or neutered dog with normal activity. If your dog gets other treats too, give less.
Questions
What amount of fennel is okay for my dog?
All treats together: at most 10% of daily calories. For a spayed or neutered dog with normal activity weighing 22 lb, that’s up to 7.2 oz (203 g) a day. Work out the amount for your dog above.
Sources
- ASPCA Toxic and Non-toxic Plants – Fennel (non-toxic to dogs, cats and horses; avoid concentrated oil)
- Nutrition data: USDA FoodData Central (31 kcal per 100 g)
Last checked: October 2026