Seinior wellness profiles are used to make sure that organ systems are functioning properly, especially needed before anethesia Diagnostic blood panels and urinalysis are good screening tools to alert to systemic dysfunction that need to be treated.
The plant chewing can be a symptom of dental problems, their mouths hurt and can resort to knawing on objects, often plants. Poinsettia is a low toxicity plant, usually causing mouth irritation(potentially making existing dental problems worse), nausea, and diarrhea.
On her exam, they apparently found tartar and gingivitis (were there any extractions performed?) Pets build up large tartar deposits that are irritating to the gums and harboring chronic infection. This will lead to decreased health, affecting all body systems.
Timely preventitive health and dental care for all pets needs to be done to reduce the incidence of later problems.