9 Deadly Dog Diseases Symptoms & Treatments

Best guide online for 9 deadly dog symptoms and diseases. Dog Diseases


Parvo Virus

Highly resistant virus withstands extreme temperature changes and exposure to most disinfectants. It can persist in the environment for months. Transmitted by feces and transported on the hair or feet of infected dogs. Attacks the intestinal tract, white blood cells, and heart muscle. Symptoms: severe bloody diarrhea, vomiting, loss of appetite, depression, and high fever. Infected pups may act depressed, collapse gasping for breath, and death may follow immediately. Death occurs within 48-72 hours after onset of symptoms. Parvo is highly contagious.

Corona Virus

It causes moderate to severe disease involving the stomach and intestines, mostly in young pups. Can set dogs up for more severe cases of Parvo. Symptoms: diarrhea, vomiting, listlessness, depression, loss of appetite, and dehydration. Dogs can suffer for several days to several weeks. Highly contagious.


An extremely infectious bacterial disease transmitted by contact with urine, nasal secretions, or saliva of infected animals. It can be spread to humans. Symptoms: high fever, depression, jaundice, bloody stools, vomiting, impaired vision, convulsions, severe thirst, and an increase in the frequency of urination. Incubation period 5-15 days. This disease can cause permanent kidney damage.

Bordetellosis-Kennel Cough

Respiratory tract infection transmitted by nasal secretions caused by the bacterium Bordetella Bronchiseptica, Adenovirus I and II, and Parainfluenza. Symptoms include a harsh, nonproductive, severe cough lasting 1-3 weeks. Coughing is stimulated by physical exertion or touching the throat area. Self-limiting unless pneumonia develops.

Hepatitis-Adenovirus Type I

Attacks the liver and cells lining the blood vessels. Transmitted by contact with contaminated objects of urine, saliva, or feces. Symptoms: sometimes a whiteness or cloudiness of the eye, high fever, edema, and hemorrhage. Another strain of the same virus causes respiratory tract infections. Early signs are similar to distemper.

Parainfluenza-Adenovirus Type II

Mild respiratory tract infection. Transmitted through contact with nasal secretions. Symptoms: fever, nasal discharge, and coughing. Mild and/or short duration (6 days). The incubation period is approximately 9 days.


Transmitted by direct/indirect contact with eye and nose discharges from an infected dog. The virus can be carried by air currents and inanimate objects, as well as urine/fecal material. Seen most often in puppies 3-6 months old, it is the primary killer of pups. Early signs resemble a severe cold. Symptoms: squinting, congestion of eyes, eye discharges, weight loss, vomiting, nasal discharge, poor appetite, and diarrhea. Most dogs have a fever and stuffy head. Distemper is highly contagious.

Lyme Disease

This is a tick-borne disease that affects dogs AND humans. Symptoms: It can appear as arthritis with sudden onset of severe pain and lameness, fever, lethargy, loss of appetite, and runny nose and eyes.


This is an infection of the central nervous system that results in paralysis and death. Rabies is always fatal and is transmitted through the bite of an infected animal. Rabies is a serious public health risk, so it is essential to vaccinate your dog. Most states have strict laws requiring vaccination. Symptoms: A stage of high excitability that includes unprovoked biting, sensitivity to noise...another stage is paralysis which includes cramps and swallowing difficulties.