The fat lumps under the goose don't determine gender. Females usually hold their heads down and have a higher-pitched honk, while ganders hold their heads high, stretch their necks, and have a more raspy honk. There is a slight weight/height difference, but it's not always reliable to go off of. Females won't start laying eggs until they're about a year old, and up. They lay large oval-shaped eggs that feel like sandpaper. Make sure they aren't hiding or eating any eggs. Both females and ganders can mount to either mate or assert dominance. ( females only mount to assert dominance. Ganders mount to mate or dominate. ) I have heard that female goose feathers are more pointed, and genders are more rounded. However, I do not know if that is true. Do you have a video of the geese honking/walking around? That would help.

Also, if you're unsure of the breeds of the two brown geese, they're both Pomeranian Saddleback.