Start with speed, severity and function
Ask when the change began, whether it is progressing and what ordinary task became harder. A slow decline can still matter, while an abrupt loss of walking, breathing or awareness can be an emergency. Function makes vague observations concrete: finishing half a meal, needing three attempts to stand, waking six times, or emptying the bowl twice.
Appetite, weight and body condition

Reduced intake, trouble chewing, increased appetite, unexplained weight change and muscle loss deserve attention. Weight can fall even while meals appear normal, and body fat can hide muscle loss. Use comparable weights and record actual food amounts.
Drinking, urination and toileting
A sustained change in thirst, urine volume, frequency, straining, leakage or house soiling should not be blamed on age. Keep water freely available. Distinguish passive sleep leakage from a conscious accident and note urine versus stool.
Mobility and comfort
Slipping, shortened walks, difficulty rising, stair refusal, trembling and changed posture may reflect pain, weakness or coordination problems. Secure traction and prevent falls rather than repeatedly testing the dog. Sudden rear leg dysfunction has a different urgency from gradual weakness.
Breathing, panting and stamina
New panting at rest, faster or harder breathing, cough, noisy breathing, poor exercise recovery or fainting needs veterinary attention. Abdominal effort, blue or gray gums, collapse or an extended neck while struggling to breathe is an emergency.
Sleep, behavior and cognition
Repeated nighttime waking, wandering, new anxiety, altered interaction, lost familiar routes, house soiling and repetitive behavior may occur with pain, sensory loss, illness or cognitive dysfunction. Several categories changing together support a broader cognitive evaluation, but dementia is not a home diagnosis.
This is a routing guide, not twenty short diagnoses
The page groups important change types so an owner can identify the next focused destination. It should not replace the detailed eating, drinking, mobility, breathing or cognition guides. Once one change is clearly dominant, continue to that page rather than using a broad list to guess at causes.
Several small changes can form one important history
A little less appetite, slightly longer sleep and slower rising may be easy to dismiss separately. Record when each began and whether they progressed together. A combined timeline can reveal a meaningful change in function even when no single observation looks dramatic.
Build the next step around the pattern
- Emergency now: breathing distress, collapse, seizure, inability to stand, severe pain, inability to urinate, swollen painful abdomen or rapid deterioration
- Prompt call: a new sustained change, multiple systems changing, medication effect or steadily declining function
- Track while arranging care: dates, frequency, triggers, appetite, water, toileting, mobility, sleep and videos that occur naturally
Do not use a normal senior blood panel from months ago to dismiss a new symptom. Examination and testing are chosen for the current history. Likewise, do not start human medication or change a prescription without the treating veterinarian.

A single change can cross categories. A dog drinking more may have larger urine volumes and new accidents. Pain may reduce appetite, shorten walks and disrupt sleep. Linking observations by date is more useful than treating each as a separate mystery. Tell the clinic when two changes began together, even if one appears minor.
Keep the pattern organized with the Senior Dog Health Checklist. The focused guides cover nighttime panting, rear leg weakness and new house accidents.
