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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 (2) abdominal pain (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 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 sometimes weight loss. Some cats may display abdominal pain or a hunched posture (1) death may occur within 48–72 hours after onset of clinical signs (1) depression (1) diarrhea (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) lethargy (1) Mild cases may show fever (1) Nonspecific signs such as lethargy (1) severe vomiting (1) so fever and septic shock can occur in advanced cases. Without prompt treatment (1) vomiting (1)
Symptom matches are best-effort. If a symptom is severe or sudden, contact a veterinarian promptly.

Gastrointestinal and Hepatobiliary

1 items
Image for Pancreatitis
Pancreatitis
Cat - All breeds
Nonspecific signs such as lethargy loss of appetite intermittent vomiting and sometimes weight loss. Some cats may display abdominal pain or a hunched posture

Inflammation of the pancreas that in cats is often milder and more chronic than the acute hemorrhagic form se…

Legacy / Unmapped

2 items
Image for Canine Infectious Hepatitis (Adenovirus)
Canine Infectious Hepatitis (Adenovirus)
Dog - All Breeds (puppies and unvaccinated dogs at highest risk)
Mild cases may show fever lethargy and loss of appetite. Severe cases (often in puppies) present with high fever depression abdominal pain vomiting +3 more

Canine infectious hepatitis is a viral disease caused by canine adenovirus type-1 (CAV-1). It primarily attac…

Image for Canine Parvovirus (Parvo)
Canine Parvovirus (Parvo)
Dog - All Breeds (unvaccinated puppies at highest risk; e.g. Rottweiler, Doberman Pinscher, Labrador, German Shepherd)
General symptoms include lethargy severe vomiting loss of appetite and bloody 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 increasing risk of sepsis +2 more

Parvovirus is a highly contagious and often fatal viral disease that attacks rapidly dividing cells, most sev…

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.