partner-contact/animal/views/menu.xml

<odoo>

    <!-- Main Menu -->
    <menuitem
        id="menu_root"
        name="Animals"
        action="action_animal"
        sequence="10"
        web_icon="animal,static/description/icon.png"
    />
    <menuitem
        id="menu_animal"
        name="Animals"
        action="action_animal"
        sequence="10"
        parent="menu_root"
    />
    <menuitem
        id="menu_config"
        name="Configuration"
        sequence="100"
        parent="menu_root"
        groups="group_animal_manager"
    />

    <!-- Configuration -->
    <menuitem id="menu_settings" name="Settings" sequence="10" parent="menu_config" />
    <menuitem
        id="menu_species"
        name="Species"
        action="action_animal_species"
        sequence="20"
        parent="menu_config"
    />
    <menuitem
        id="menu_breed"
        name="Breeds"
        action="action_animal_breed"
        sequence="30"
        parent="menu_config"
    />
    <menuitem
        id="menu_color"
        name="Colors"
        action="action_animal_color"
        sequence="40"
        parent="menu_config"
    />

</odoo>