Yertle the Turtle and Other Stories
Other Birds in "Gertrude McFuzz"
What's the deal with those birds who schlep Gertrude around for two full weeks at the end of the story, despite any damage to their beaks? Like Lolla-Lee-Lou, they're not really fleshed out and are more of a symbol. They're there to say, "SEE what kind of harm you do not just to yourself but to the people around you when you're selfish and vain? You don't make decisions in a vacuum, toots."
Yep, even in this very short, much simpler parable, Seuss is still concerned with the effect the actions of the few have on the lives of the many.