PART FOUR: One element of an exam for hind-end weakness that is missing in Eleven's exam, is present in Bonny's. Bonny has mild hind-end weakness, so Dr. Carolynn Harvey tests her for difficulties. Including this exam of Bonny rounds out a full exam of a pet rat for hind-end weakness.
PART ONE: Hind-End Weakness in Pet Rats - Dr. Pilny discusses causes of, and answers questions related to, hind-end weakness. The rat being examined is Elevenee, who has advanced hind-end weakness.
PART THREE: Exam of Elevenee's Self-Barbering in Relation to His Hind-End Weakness. Dr. Pilny examines Eleven's nose closely to determine what could be determining the loss of hair.
PART TWO: Exam, Diagnosis and Decision for Treatment of Eleven's Hind-End Weakness. Dr. Pilny further examines Eleven.