10 Signs Your Dog Needs a Vet Visit
As pet parents, we know our dogs better than anyone. But sometimes it's hard to tell whether a symptom is something to worry about or just a passing thing. Here are 10 warning signs that mean it's time to call the vet.
1. Sudden Loss of Appetite
If your dog skips one meal, don't panic. But if they refuse food for more than 24 hours, something could be wrong. Dogs are naturally food-motivated, so a persistent lack of interest in eating is one of the earliest indicators of illness.
What to watch for: Turning away from favorite treats, dropping food after picking it up, or showing interest in food but not eating.
2. Excessive Thirst or Urination
Drinking significantly more water than usual (polydipsia) or needing to go outside much more frequently can signal diabetes, kidney disease, or a urinary tract infection. Track your dog's water intake for a day or two if you notice a change.
3. Lethargy or Unusual Fatigue
Every dog has lazy days, but if your normally energetic pup suddenly can't be bothered to get off the couch for a walk or play session, pay attention. Persistent lethargy lasting more than 48 hours warrants a vet visit.
4. Vomiting or Diarrhea That Lasts More Than a Day
Occasional stomach upset is normal. But repeated vomiting, bloody diarrhea, or symptoms lasting beyond 24 hours can indicate poisoning, intestinal blockage, or infection. If you see blood in vomit or stool, go to the vet immediately.
5. Difficulty Breathing or Persistent Coughing
Labored breathing, wheezing, or a cough that doesn't resolve within a few days could point to heart disease, pneumonia, kennel cough, or even a foreign object lodged in the airway. Breathing issues are always urgent.
6. Sudden Weight Loss or Gain
Unexplained weight changes of more than 10% of body weight over a short period should be investigated. Weight loss can indicate cancer, diabetes, or thyroid issues. Sudden weight gain might point to fluid retention or hormonal imbalances.
7. Changes in Behavior or Mood
A friendly dog becoming aggressive, a calm dog becoming anxious, or any sudden personality shift can indicate pain, neurological issues, or cognitive decline in senior dogs. Dogs can't tell us they're hurting, so behavior changes are their way of communicating.
8. Limping or Difficulty Moving
While minor limping after intense play might resolve on its own, persistent lameness, reluctance to climb stairs, or difficulty standing up — especially in the morning — can signal arthritis, joint issues, or injury.
9. Red, Cloudy, or Discharge from Eyes
Eye issues can escalate quickly. Redness, cloudiness, excessive tearing, squinting, or any discharge should be checked promptly. Conditions like glaucoma can cause permanent vision loss if not treated early.
10. Lumps, Bumps, or Skin Changes
Not every lump is cancer, but every new lump should be checked. Also watch for skin that's become flaky, red, or has unusual odors. Changes in coat quality — excessive shedding, bald patches, or dullness — can indicate underlying health issues.
When in Doubt, Call Your Vet
You know your dog best. If something feels off, trust your instincts. It's always better to have a vet visit that turns out to be nothing than to wait and wish you hadn't.
Pro tip: Use a pet health tracking app like Pet Capsule to log symptoms, track changes over time, and share detailed health reports with your vet. Having data makes the vet visit more productive and can help catch issues earlier.
Pet Capsule's AI health scanning can help you identify potential health concerns and know when it's time for a vet visit. Join the waitlist to be among the first to try it.