For an average size dog, add one teaspoon of ground fennel seed per day to your dog's feed with a little bit of broth or water. (onpets.com)
Finely grind fennel seeds in spice mill or with mortar and pestle; add to bread mixture along with oregano, nutmeg, black pepper, red pepper flakes, and 1 1/4 tsp. (epicurious.com)
finely ground fennel seeds (optional - I didn't have any and omitted it this time) 28 oz. (ahintofhoney.com)