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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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Clear symptoms
loss of appetite (3) lethargy (2) abdominal pain (1) abnormal bleeding or discharge (1) and bloody (1) and jaundice (yellowing of gums/eyes) due to liver damage. “Blue eye” (cloudy cornea) can appear during recovery due to immune complexes. Severe infections can cause bleeding (petechiae or bruising) and swelling of the neck/head (1) and lethargy. For example (1) and loss of appetite. Severe cases (often in puppies) present with high fever (1) and may be rapidly fatal due to liver failure or bleeding (1) and rapid dehydration. In kittens (1) and sometimes weight loss. Some cats may display abdominal pain or a hunched posture (1) but any lump should be checked) (1) death may occur within 48–72 hours after onset of clinical signs (1) depression (1) diarrhea (1) drooling (1) foul-smelling diarrhea that can quickly lead to life-threatening dehydration. Affected pups often develop abdominal pain and bloating. The virus’s attack on bone marrow leads to low white blood cell counts (1) General symptoms include lethargy (1) increasing risk of sepsis (1) intermittent vomiting (1) it can be rapidly fatal (1) lameness or swelling in the bone (for bone cancers) (1) lymphomas may cause enlarged lymph nodes (1) Mild cases may show fever (1) Nonspecific signs such as lethargy (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) severe vomiting (1) severe vomiting and diarrhea (1) Signs include high fever (1) Signs of cancer vary widely with the type and location. Possible signs include a persistent lump or swelling (not all are malignant (1) so fever and septic shock can occur in advanced cases. Without prompt treatment (1) sores that don’t heal (1) unexplained weight loss or loss of appetite (1) vomiting (1)
Symptom matches are best-effort. If a symptom is severe or sudden, contact a veterinarian promptly.

Gastrointestinal and Hepatobiliary

1 items

Infectious and Parasitic

1 items

Legacy / Unmapped

3 items
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.