WHAT TO TRACK: For a 4–6 week window, document (1) walk duration before slowing, (2) time to recover after activity, (3) nighttime waking episodes, (4) appetite consistency, (5) interest in play or training, and (6) any new confusion behaviors. These markers map to the real-life consequences of NAD drain—less overhead for energy and brain work—without pretending a home log can measure NAD directly. Tracking also helps separate fatigue from pain, because pain often shows as reluctance to move, licking joints, or irritability.
Use the same conditions when possible: similar time of day, similar route, similar temperature. Add notes about weather, visitors, and medication timing. A veterinarian can use this record to decide whether to prioritize orthopedic evaluation, cognitive screening, thyroid testing, heart assessment, or a broader senior panel. Better tracking leads to a more targeted workup and fewer guesswork changes.