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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Browse by symptom
Clear symptoms
weight loss (5)
dehydration (2)
diarrhea (2)
vomiting (2)
a pot-bellied appearance (1)
a transient fever and lymph node enlargement may occur but are often missed. Later (1)
abnormal bleeding or discharge (1)
affected cats develop recurrent infections (eg (1)
and a dull coat (1)
and a poorly groomed coat can occur if untreated (1)
and anemia (1)
and diabetic ketoacidosis (1)
and general poor condition develop. Advanced cases can show persistent fever (1)
and lethargy (1)
and lethargy. Advanced cases may present with vomiting (1)
and lethargy. For example (1)
and loses weight. Lethargy (1)
and occasional shaking. In an acute crisis (1)
and sometimes signs of anemia or cancer (lymphoma (1)
and sometimes ulcerate. Advanced cases may lead to weight loss (1)
and sometimes weight loss. Some cats may display abdominal pain or a hunched posture (1)
and weakness (1)
attached (1)
but any lump should be checked) (1)
chronic secondary infections (eg (1)
dogs can collapse with shock (1)
Dogs may experience lethargy (1)
drooling (1)
Early infections may be asymptomatic or cause mild fever and lymph node enlargement. Over time (1)
evaluate for weight loss-related red flags and progression (1)
foul-smelling (1)
has a voracious appetite (1)
increased appetite with weight loss (1)
increased appetite yet weight loss are classic signs. Owners may notice the cat drinks and pees far more than normal (1)
Increased thirst and urination (1)
increased thirst and urination (1)
increased urination (1)
intermittent vomiting (1)
lameness or swelling in the bone (for bone cancers) (1)
lethargy (1)
leukemia) (1)
loss of appetite (1)
lymphomas may cause enlarged lymph nodes (1)
Many adult dogs show no signs or only soft stools. Symptomatic cases (more common in puppies or stressed dogs) typically have diarrhea that can be acute (1)
Many cats with a light parasite load show no symptoms. When symptomatic (1)
neurologic issues (1)
Nonspecific signs such as lethargy (1)
Often no signs early on. Within 1–3 months after infection (1)
See all symptoms (72)
a pot-bellied appearance (1)
a transient fever and lymph node enlargement may occur but are often missed. Later (1)
abnormal bleeding or discharge (1)
affected cats develop recurrent infections (eg (1)
and a dull coat (1)
and a poorly groomed coat can occur if untreated (1)
and anemia (1)
and diabetic ketoacidosis (1)
and general poor condition develop. Advanced cases can show persistent fever (1)
and lethargy (1)
and lethargy. Advanced cases may present with vomiting (1)
and lethargy. For example (1)
and loses weight. Lethargy (1)
and occasional shaking. In an acute crisis (1)
and sometimes signs of anemia or cancer (lymphoma (1)
and sometimes ulcerate. Advanced cases may lead to weight loss (1)
and sometimes weight loss. Some cats may display abdominal pain or a hunched posture (1)
and weakness (1)
attached (1)
but any lump should be checked) (1)
chronic secondary infections (eg (1)
dehydration (2)
diarrhea (2)
dogs can collapse with shock (1)
Dogs may experience lethargy (1)
drooling (1)
Early infections may be asymptomatic or cause mild fever and lymph node enlargement. Over time (1)
evaluate for weight loss-related red flags and progression (1)
foul-smelling (1)
has a voracious appetite (1)
increased appetite with weight loss (1)
increased appetite yet weight loss are classic signs. Owners may notice the cat drinks and pees far more than normal (1)
Increased thirst and urination (1)
increased thirst and urination (1)
increased urination (1)
intermittent vomiting (1)
lameness or swelling in the bone (for bone cancers) (1)
lethargy (1)
leukemia) (1)
loss of appetite (1)
lymphomas may cause enlarged lymph nodes (1)
Many adult dogs show no signs or only soft stools. Symptomatic cases (more common in puppies or stressed dogs) typically have diarrhea that can be acute (1)
Many cats with a light parasite load show no symptoms. When symptomatic (1)
neurologic issues (1)
Nonspecific signs such as lethargy (1)
Often no signs early on. Within 1–3 months after infection (1)
often with a greenish tinge or mucus. The diarrhea may be intermittent or continuous and can contain blood in severe infections. Affected dogs might have weight loss and poor coat condition due to malnutrition. Vomiting occurs in some cases. The dog usually remains alert and eating (1)
One or more small lumps in the mammary chain that grow over time (1)
or difficulty eating. Any unusual new symptoms in an older dog can be a red flag (1)
or respiratory signs if metastasis occurs (1)
oral cancers might present as foul breath (1)
oral) (1)
persistent fever (1)
poor coat condition (1)
poor growth (in kittens) (1)
recurrent gum infections (1)
respiratory (1)
respiratory or skin infections) (1)
severe vomiting/diarrhea (1)
signs include diarrhea (sometimes with mucus or blood) (1)
Signs include excessive thirst (1)
Signs may vary (1)
Signs of cancer vary widely with the type and location. Possible signs include a persistent lump or swelling (not all are malignant (1)
soft or watery (1)
sores that don’t heal (1)
Symptoms vary: wet FIP causes fluid accumulation in body cavities (1)
they may be firm (1)
though in heavy infestations appetite might decrease (1)
unexplained weight loss or loss of appetite (1)
vomiting (2)
weight loss (5)
while dry FIP leads to granulomas in organs (1)
Symptom matches are best-effort. If a symptom is severe or sudden, contact a veterinarian promptly.
Endocrine and Metabolic
2 itemsGastrointestinal and Hepatobiliary
1 itemsGeneral and Multi-System
1 itemsInfectious and Parasitic
1 itemsLegacy / Unmapped
7 itemsFor 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.
Medical Disclaimer: Information on PetWisePlus is not a substitute for professional veterinary care. Consult your veterinarian for advice.