When Goosey tells Lucy that they can't be sisters because she's a goose and Lucy is a dog, Lucy tries to prove that she's a goose, too! I love you, Goosey. You are my big sister. No, I am a goose. You, Lucy, are a dog. Look! I have glossy goosey feathers. Those are not feathers. They are leaves. Lucy loves her big sister, Goosey, very much! However, there's one problem . . . Goosey doesn't think that Lucy is her sister, because Lucy is a dog. Lucy tries to show Goosey just how good of a goose she is. She displays her glossy goose feathers (made up of leaves), her goose honk (bark), and her nest of eggs (rocks), but Goosey isn't convinced. Lucy may not be able to make Goosey think that she's a goose, but she is able to show her love for her big sister when she uses her loud bark to protect Goosey's eggs from danger.