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Health A-Z

Common Pet Conditions

Start with a symptom, then learn what to monitor and what your vet may check.

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fever (2) A persistent (1) abnormal bleeding or discharge (1) and lethargy. For example (1) and may bring up a small amount of white foamy phlegm. Despite the harsh cough (1) and reduced appetite. In severe cases (1) as if trying to clear something (1) but any lump should be checked) (1) Dogs typically develop a persistent cough (dry or productive) (1) drooling (1) dry “honking” cough is the hallmark symptom. Affected dogs often gag or retch (1) lameness or swelling in the bone (for bone cancers) (1) lethargy (1) lymphomas may cause enlarged lymph nodes (1) many dogs remain bright and active with a normal appetite and no fever. In some cases there may be sneezing or a mild runny nose (1) more severe cases can show lethargy (1) nasal discharge (1) or difficulty breathing if pneumonia develops (1) or difficulty eating. Any unusual new symptoms in an older dog can be a red flag (1) oral cancers might present as foul breath (1) pneumonia may develop (1) Signs of cancer vary widely with the type and location. Possible signs include a persistent lump or swelling (not all are malignant (1) sores that don’t heal (1) unexplained weight loss or loss of appetite (1)
Symptom matches are best-effort. If a symptom is severe or sudden, contact a veterinarian promptly.

Infectious and Parasitic

1 items
Image for Canine Influenza (Dog Flu)
Canine Influenza (Dog Flu)
Dog - All breeds and ages can be affected; higher incidence in dogs with high exposure (boarding, shelters)
Dogs typically develop a persistent cough (dry or productive) nasal discharge fever lethargy and reduced appetite. In severe cases pneumonia may develop

Canine influenza is a contagious respiratory infection caused by influenza A viruses (commonly H3N8 and H3N2)…

Legacy / Unmapped

2 items
Image for Cancer
Cancer
Dog - All Breeds (more common in older dogs; certain breeds prone to specific cancers)
Signs of cancer vary widely with the type and location. Possible signs include a persistent lump or swelling (not all are malignant but any lump should be checked) sores that don’t heal abnormal bleeding or discharge lameness or swelling in the bone (for bone cancers) unexplained weight loss or loss of appetite +5 more

Cancer in dogs is a broad group of diseases where cells grow uncontrollably, invade surrounding tissue, and m…

Image for Kennel Cough (Infectious Tracheobronchitis)
Kennel Cough (Infectious Tracheobronchitis)
Dog - All Breeds (especially those in close contact with others – e.g. boarding, shelters)
A persistent dry “honking” cough is the hallmark symptom. Affected dogs often gag or retch as if trying to clear something and may bring up a small amount of white foamy phlegm. Despite the harsh cough many dogs remain bright and active with a normal appetite and no fever. In some cases there may be sneezing or a mild runny nose more severe cases can show lethargy +2 more

Kennel cough refers to a contagious complex of respiratory infections (viral and bacterial) that cause trache…

For pet owners
Use this page to learn what a symptom can mean, what to track at home, and when to get help. Bring notes to your appointment (timeline, appetite, water intake, urination, stool, vomiting episodes, medications and supplements).
For veterinary perspective
Each condition page summarizes common presentations, typical evaluation steps, and treatment approaches. It is not a substitute for diagnosis. Your veterinarian will consider breed, age, exam findings, and tests.