Dog or Cat Not Acting Right? A Vet-Informed Checklist for What to Watch (and When to Call)

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Doctor talking with patients in a hospital

Start with the basics

When your pet seems “off,” it’s easy to miss the small details that help your veterinarian figure out what’s going on. This quick checklist helps you observe the right things, decide what’s urgent, and prepare for a more productive vet visit.

Step 1: Check for emergency red flags

Seek urgent veterinary care if you notice any of the following:
  • Difficulty breathing, blue/pale gums, or collapse
  • Repeated vomiting with inability to keep water down
  • Seizures, severe weakness, or sudden disorientation
  • Bloated abdomen (especially with unproductive retching)
  • Uncontrolled bleeding or suspected trauma
  • Straining to urinate, crying in the litter box, or producing little/no urine
  • Known or suspected toxin exposure (human meds, rodent bait, chocolate, xylitol, lilies, etc.)

Step 2: Note the “what, when, and how much”

Write down (or screenshot) these details before you call:
  • When it started: sudden vs. gradual, and whether it’s getting worse
  • Appetite and water intake: normal, reduced, or increased
  • Bathroom habits: diarrhea, constipation, accidents, straining, or changes in urine volume
  • Vomiting: how many times, what it looked like, and whether food/water stays down
  • Energy level: sleeping more, hiding, reluctance to jump, or exercise intolerance
  • Pain clues: panting, trembling, yelping, guarding the belly, limping

Step 3: Do a quick at-home check (no special tools)

These observations can be helpful, but don’t force anything that stresses your pet.
  • Breathing: is it fast, noisy, or labored?
  • Gums: should be pink and moist (very pale, white, blue, or tacky gums are concerning)
  • Hydration: dry gums and sunken eyes can suggest dehydration
  • Temperature: if you have a pet thermometer, note the reading (don’t guess by ear)
  • Mobility: can they stand and walk normally?

Step 4: Common scenarios and what to do next

Use these as general guidance while you arrange veterinary advice:
  • Mild diarrhea but acting normal: call your vet for diet guidance and monitoring steps; watch hydration closely.
  • Vomiting once, then normal: monitor and call if it repeats, appetite drops, or your pet seems painful or lethargic.
  • Itching, ear shaking, or skin redness: note where it is, any new foods/treats, and whether there’s odor or discharge.
  • Older pet slowing down: track stiffness, difficulty rising, or changes in stairs/jumping—these details help evaluate arthritis and pain control.

Step 5: What to bring to your appointment

  • A list of current medications/supplements (with doses)
  • Photos/videos of symptoms (coughing, limping, seizures, breathing effort)
  • Any recent diet changes, new treats, chews, or table scraps
  • Potential exposures (trash, compost, plants, human meds)
Doctor talking with patients in a hospital

How VetCareInfo can help

VetCareInfo publishes clear, vet-informed articles on common dog and cat conditions—what symptoms look like, what questions to ask, and what to discuss with your veterinarian. If you’re looking for practical next steps, browse our Articles index and explore topics like dental health, skin and coat concerns, joint support, and senior pet care. Medical note: This content is for general educational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment.