To catch health issues in your dog early, daily observation is key. Here’s a summary of the essential warning signs and how to respond.



| Item | Key Signs | Response | When to Visit the Clinic |
|---|---|---|---|
| Mild | Slightly decreased appetite, slightly reduced activity, changes in bowel habits, mild itching | Daily monitoring, dietary adjustment, environmental stability | Visit if it persists for more than 3 days |
| Moderate | Recurring diarrhea, constipation, itching, increased tearing or discharge | Dietary control, parasite prevention, health management | Visit if it persists for more than a week |
| Severe | Complete loss of appetite, persistent vomiting, bloody stool, severe drowsiness, difficulty breathing, sudden collapse | Visit the clinic immediately, fasting recommended, supportive care | Visit within 24 hours is essential |
If symptoms persist or worsen, consult a veterinarian immediately.

Signs Requiring an Immediate Vet Visit
If your dog completely loses its appetite, experiences repeated vomiting or diarrhea, or if you notice blood in the stool, you should take it to the vet immediately. These could be signs of a life-threatening condition. Especially if symptoms persist for more than 24 hours, prompt veterinary care is essential. Additionally, if loss of appetite is accompanied by lethargy, difficulty breathing, or collapse, immediate action is necessary.

Caution: Self-Diagnosis Is Dangerous
Giving your dog medication or attempting home treatment based on symptoms can worsen their condition. All symptoms require a veterinarian’s diagnosis, and you must consult your vet before administering any medication.

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.
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[1] Veterinary Guide to Preventing Behavior Problems in Dogs and Cats, 2023
[2] Notes on Canine Internal Medicine, 4th Ed, 2022
[3] Small Animal Critical Care Medicine, 3rd Ed, 2021