Is My Dog or Cat Sick?
Free Pet Symptom Checker — 200 Common Symptoms Explained
Is Your Pet Showing a Symptom You Don’t Understand?
Is your dog refusing to eat?
Is your cat coughing or acting strange?
Is your pet vomiting, shaking, limping, scratching, or behaving differently?
As a pet owner, it can be stressful when your dog or cat suddenly shows a symptom you don’t understand.
Our free Pet Symptom Checker helps you explore 200 common dog and cat symptoms, understand possible causes, recognize warning signs, and learn when veterinary care may be needed.
Check Your Pet’s Symptoms
Start with what you can see. Search your pet’s symptom and explore the information available for it.
No sign-up • No subscription • Educational information
200 common dog and cat symptoms — all in one place.
What Is the Pet Symptom Checker?
Pet Symptom Checker is a free online educational tool designed to help dog and cat owners explore common symptoms and understand what they may mean.
It covers 200 common symptoms across major health and behavior categories, making it easier to start with the symptom you can actually see instead of trying to guess what condition your pet may have.
For each symptom, the tool provides information about possible causes, what to consider next, and warning signs that may require professional veterinary attention.
Find a Veterinary Clinic Near You
Need Emergency Veterinary Care?
If your pet is experiencing a serious or rapidly worsening condition, don’t wait for an online tool to provide an answer.
Contact an emergency veterinary service or seek immediate professional care.
For additional guidance about pet emergencies and when immediate veterinary care may be necessary, see the ASPCA Emergency Care for Your Pet guide.
Our emergency vet search can help you locate emergency veterinary services in your area.
200 Symptoms Across 16 Categories
Our Pet Symptom Checker organizes 200 common dog and cat symptoms into 16 categories, making it easier to find the information you’re looking for.
Appetite
🍽️Appetite — not eating, loss of appetite, overeating, rapid weight loss
Digestive
🫃Digestive — vomiting, diarrhea, overeating, bloating, blood in stool
Respiratory
🫁 Respiratory — coughing, wheezing, sneezing, breathing difficulties
Skin
🐾 Skin & Coat — itching, hair loss, rashes, lumps, swelling
Mobility
🦴 Mobility & Movement — limping, weakness, difficulty walking, paralysis
Urinary
💧 Urinary — frequent urination, difficulty urinating, blood in urine, blockage
Behavior
🧠 Behavior & Mental Changes — aggression, hiding, confusion, anxiety, unusual behavior
Dental
🦷 Dental & Teeth — bad breath, tartar, swollen gums, tooth pain
Neurological
⚡ Neurological — head tilt, circling, tremors, seizures, balance problems
Eyes
👁️ Eyes — discharge, cloudiness, squinting, redness
Ears
👂 Ears — scratching, discharge, ear mites, infections
Emergency
🚨 Emergency — toxic ingestion, snake bite, heatstroke, collapse
Cardiovascular
❤️ Cardiovascular — heart-related symptoms, fainting, weakness, rapid breathing
Oral
👄 Oral & Mouth — ulcers, drooling, mouth growths
Reproductive
🐣 Reproductive — pyometra, mastitis, difficult labor, eclampsia
General
⚕️ General Health — fever, weight changes, anemia, and other general health concerns
Help Us Keep the Pet Symptom Checker Free
The Pet Symptom Checker is free to use and we want to keep it accessible to dog and cat owners.
If you find the tool helpful, a small donation can help us maintain the website, improve the tool, add new information, and create more free resources for pet owners.
Important Information
The Pet Symptom Checker is a free educational tool designed to help pet owners better understand common symptoms in dogs and cats.
It does not diagnose diseases or medical conditions and should not be used as a substitute for professional veterinary examination, diagnosis, or treatment.
If your pet is experiencing severe, rapidly worsening, or potentially life-threatening symptoms, contact a licensed veterinarian or emergency veterinary hospital immediately.
When in doubt, seek professional veterinary advice.
Is Your Pet Showing a Symptom?
Start with what you can see.
Vomiting? Not eating? Limping? Coughing? Shaking?
Search the symptom, explore the available information, and learn what to consider next.
CHECK MY PET’S SYMPTOMS — FREE →
No sign-up • No subscription • Educational information
200 common dog and cat symptoms — all in one place.
Free · No sign-up required · Works on mobile and desktop
**Sidnir Vieira**
Founder of TechHavela
A passionate pet and tech content creator, helping dog owners across the U.S. make smarter decisions for their furry friends.
