She may assume that the problem is merely behavioral in nature and be more inclined to call a trainer, who may or may not be familiar with medical rule-outs for this sudden behavior change.
As a dog owner, you cannot be expected to be familiar with all the medical rule-outs for dozens of abnormal canine behaviors.
The more knowledge a trainer has of medical rule-outs for abnormal behavior, the better equipped she will be to help her clients recognize when a visit to the veterinarian is needed - a visit that may heal the family's relationship with their dog, and save the dog's life.
Included in her discussion of each abnormal canine behavior and behavioral pathology are rule-outs for the conditions, both medical and non-medical.
As non-veterinarians we are not qualified to make medical or behavioral diagnoses, so the behavioral conditions in the tables are listed descriptively, by observable behavior (rather than diagnostic category), with corresponding medical rule-outs.