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Common Pet Conditions

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

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lethargy (7) loss of appetite (3) dehydration (2) diarrhea (2) fever (2) increased thirst and urination (2) vomiting (2) weight loss (2) A persistent (1) a pot-bellied appearance (1) abdominal pain (1) abnormal bleeding or discharge (1) and a poorly groomed coat can occur if untreated (1) and bloody (1) and cold intolerance. Skin and coat changes (thinning hair (1) and diabetic ketoacidosis (1) and excessive panting. Owners often notice a “pot-bellied” abdomen due to enlarged liver and weakened abdominal muscles. The skin thins and hair loss occurs – often a symmetric alopecia along the flanks. Recurrent skin infections or delayed wound healing can happen due to cortisol’s immune suppression. Muscle weakness (1) and in severe cases (1) and infertility in intact dogs are other possible signs (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 (1) and lethargy. Advanced cases may present with vomiting (1) and lethargy. For example (1) and loses weight. Lethargy (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 may bring up a small amount of white foamy phlegm. Despite the harsh cough (1) and occasional shaking. In an acute crisis (1) and rapid dehydration. In kittens (1) and recurrent infections (1) and reduced appetite. In severe cases (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) as if trying to clear something (1) attached (1) but any lump should be checked) (1) Common signs include fever (1) Common signs include lethargy (1) death may occur within 48–72 hours after onset of clinical signs (1) depression (1) dogs can collapse with shock (1) Dogs may experience lethargy (1) Dogs typically develop a persistent cough (dry or productive) (1) Dogs typically exhibit increased appetite (1) drooling (1) dry brittle coat (1) dry “honking” cough is the hallmark symptom. Affected dogs often gag or retch (1)
See all symptoms (96)
A persistent (1) a pot-bellied appearance (1) abdominal pain (1) abnormal bleeding or discharge (1) and a poorly groomed coat can occur if untreated (1) and bloody (1) and cold intolerance. Skin and coat changes (thinning hair (1) and diabetic ketoacidosis (1) and excessive panting. Owners often notice a “pot-bellied” abdomen due to enlarged liver and weakened abdominal muscles. The skin thins and hair loss occurs – often a symmetric alopecia along the flanks. Recurrent skin infections or delayed wound healing can happen due to cortisol’s immune suppression. Muscle weakness (1) and in severe cases (1) and infertility in intact dogs are other possible signs (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 (1) and lethargy. Advanced cases may present with vomiting (1) and lethargy. For example (1) and loses weight. Lethargy (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 may bring up a small amount of white foamy phlegm. Despite the harsh cough (1) and occasional shaking. In an acute crisis (1) and rapid dehydration. In kittens (1) and recurrent infections (1) and reduced appetite. In severe cases (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) as if trying to clear something (1) attached (1) but any lump should be checked) (1) Common signs include fever (1) Common signs include lethargy (1) death may occur within 48–72 hours after onset of clinical signs (1) dehydration (2) depression (1) diarrhea (2) dogs can collapse with shock (1) Dogs may experience lethargy (1) Dogs typically develop a persistent cough (dry or productive) (1) Dogs typically exhibit increased appetite (1) drooling (1) dry brittle coat (1) dry “honking” cough is the hallmark symptom. Affected dogs often gag or retch (1) evaluate for lethargy / collapse / syncope-related red flags and progression (1) fever (2) 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) has a voracious appetite (1) hyperpigmented skin) are also seen (1) increased appetite (often very food-motivated) (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 (2) increased urination (1) increasing risk of sepsis (1) intermittent vomiting (1) it can be rapidly fatal (1) joint swelling (1) kidney inflammation (Lyme nephritis) (1) lameness or swelling in the bone (for bone cancers) (1) lethargy (7) loss of appetite (3) 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) mental dullness (1) Mild cases may show fever (1) more severe cases can show lethargy (1) nasal discharge (1) Nonspecific signs such as lethargy (1) One or more small lumps in the mammary chain that grow over time (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) or respiratory signs if metastasis occurs (1) oral cancers might present as foul breath (1) panting (1) persistent fever (1) pneumonia may develop (1) severe vomiting (1) severe vomiting and diarrhea (1) severe vomiting/diarrhea (1) shifting-leg lameness (1) Signs include excessive thirst (1) Signs include high fever (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) so fever and septic shock can occur in advanced cases. Without prompt treatment (1) sores that don’t heal (1) Symptoms tend to develop gradually. Common signs are increased thirst and urination (dogs may begin having accidents or need more frequent outings) (1) Symptoms vary: wet FIP causes fluid accumulation in body cavities (1) they may be firm (1) thin skin with hair loss (1) unexplained weight loss or loss of appetite (1) vomiting (2) weight gain despite a normal diet (1) weight loss (2) 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

3 items

Gastrointestinal and Hepatobiliary

1 items

General and Multi-System

1 items

Infectious and Parasitic

4 items

Legacy / Unmapped

8 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.