Most Common Dog Diseases: Learn to Detect Them Early

Detecting any signs of illness early can make the difference between simple treatment and major complications. At Vetco, we want to help you identify the most common dog diseases so you can act quickly.

By Vetco 5 min read
Diseases Pets Veterinarian Celaya San Miguel de Allende

As a dog owner, you know your furry friend isn't just a pet—they're part of your family. That's why detecting any signs of illness early can make the difference between simple treatment and major complications. At Vetco, we want to help you identify the most common dog diseases so you can act quickly.

Why is early detection so important?

Dogs can't tell us in words when something hurts or they're feeling sick. They depend entirely on our observation and attention. Many diseases that seem minor at first can become serious problems if left untreated. The good news is that by knowing the signs, you can be your companion's best health advocate.

The 7 most common diseases and their warning signs

1. Canine Parvovirus

This viral disease is especially dangerous in puppies and young unvaccinated dogs.

Warning signs:

  • Severe and persistent vomiting

  • Bloody diarrhea with a very strong odor

  • Complete loss of appetite

  • Extreme lethargy and fever

  • Rapid dehydration

What to do? Parvovirus requires immediate veterinary attention. Vaccination is your best prevention tool.

2. Canine Distemper

A viral disease that affects multiple body systems.

Warning signs:

  • Nasal and eye discharge (at first it may seem like a cold)

  • Persistent cough

  • Fever that comes and goes

  • Loss of appetite and weakness

  • In advanced stages: seizures and neurological problems

What to do? If you notice these symptoms, especially the combination of discharge and fever, go to the vet immediately.

3. Otitis (Ear Infections)

Very common, especially in breeds with floppy ears like Cocker Spaniels or Basset Hounds.

Warning signs:

  • Your dog constantly shakes their head

  • Scratches ears persistently

  • Bad odor coming from the ear

  • Redness or swelling in the ear canal

  • Head tilting to one side

  • Dark or yellowish discharge

What to do? Don't try to clean the ear deeply on your own. A professional examination will determine if there's a bacterial or fungal infection.

4. Dermatological Problems (Allergies and Dermatitis)

Your dog's skin can reflect everything from food allergies to parasitic problems.

Warning signs:

  • Excessive and constant scratching

  • Compulsive licking of paws or body

  • Skin redness

  • Abnormal hair loss or bald patches

  • Bad skin odor

  • Scabs or wounds from scratching

What to do? Allergies can be complex to diagnose. At Vetco, we perform tests to identify the exact cause and offer you the best treatment.

5. Gastrointestinal Problems

From parasites to food intolerances, the digestive system is vulnerable.

Warning signs:

  • Frequent vomiting (more than twice in 24 hours)

  • Persistent diarrhea

  • Swollen or painful abdomen

  • Weight loss with no apparent reason

  • Changes in appetite

  • Excessive gas

What to do? Don't wait more than 24 hours if symptoms persist, especially in puppies or senior dogs.

6. Dental Disease

More than 80% of dogs over 3 years old have some degree of periodontal disease.

Warning signs:

  • Bad breath (beyond normal "dog breath")

  • Red or bleeding gums

  • Difficulty eating or pain when chewing

  • Tooth loss

  • Visible tartar (yellow or brown stains on teeth)

  • Excessive drooling

What to do? Dental health directly impacts the heart, liver, and kidneys. Professional dental cleanings are essential.

7. Joint Problems and Dysplasia

Common in large breed dogs and senior adults.

Warning signs:

  • Limping or difficulty getting up

  • Stiffness after resting

  • Less interest in playing or walking

  • Difficulty climbing stairs or getting in the car

  • Licking specific joints

  • Behavior changes (irritability due to pain)

What to do? Early management with proper treatment and exercise can significantly improve their quality of life.

Your observation routine: weekly checklist

To help you detect problems early, we recommend doing these weekly checks:

Eyes: Clear, no discharge or redness
Ears: Clean, no bad odor
Nose: Moist, no abnormal discharge
Mouth and teeth: Pink gums, no extreme bad breath
Skin and coat: No red areas, scabs, or hair loss
Behavior: Normal energy level, good appetite
Stools: Normal consistency, no blood

When to come to Vetco immediately

Some situations can't wait:

  • Difficulty breathing

  • Bleeding that won't stop

  • Seizures

  • Vomiting or diarrhea with blood

  • Inability to urinate

  • Trauma or accident

  • Swollen and hard abdomen

  • Collapse or loss of consciousness

  • Suspected poisoning

Prevention is the best treatment

At Vetco we firmly believe that preventive medicine is the key to a long and healthy life for your dog. Our services include:

  • General and specialized consultations

  • Personalized vaccination programs

  • Internal and external deworming

  • Geriatric check-ups for senior dogs

  • Clinical analysis and diagnostic imaging

  • Surgery and hospitalization

  • Emergency services

We're close to you

MAIN BRANCH - Celaya

Address: Guillermo Prieto #605 Int 2, Col. Alameda, Celaya, Gto.
Phone: 461 613 6415 | 461 273 1517

BRANCH - Juventino Rosas

Address: Ignacio Ramírez #220, Zona Centro, Juventino Rosas, Gto.
Phone: 412 157 6382 | 412 123 9083


Your peace of mind, our priority

Nobody knows your dog better than you do. If something doesn't feel right, trust your instinct. At Vetco we're here to support you with years of experience caring for pets' health in Guanajuato.

Remember: early detection can save your furry friend's life. Don't wait for symptoms to get worse. Schedule your appointment today!


Have questions about your dog's health? Contact us on WhatsApp or call us. At Vetco, your pet is our priority.

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