Chuck...OR...Thumper?

There was a young buck named Chuck,
who loved the feeder potluck.
He wasn't quite done,
but he had a question.
He asked..."WHO'S DRIVING THIS TRUCK?"

OR


There was a young doe named Thumper,
she ate with the birds, and got plumper.
She feasted on seeds,
to sate her hunger needs,
but asked..."WHO'S STEERING THIS DUMPER?"