Jaundice (Icterus) in Dogs — Symptom Decision Guide

A practical guide to recognizing and assessing jaundice (icterus) in dogs. Learn likely causes (IMHA, hepatitis, bile duct obstruction), what to check at home, when it’s an emergency, and what to tell your vet.

Quick Assessment

• Is this an emergency?

• Most common causes

• When to see a vet

What jaundice (icterus) looks like — what owners notice

Jaundice is a yellow discoloration caused by elevated bilirubin. Common signs you may see:

• Yellowing of the whites of the eyes (sclera), gums, inner eyelids, and skin
• Yellowing around the ears, belly, or paw pads in light-haired dogs
• Dark, brownish or tea-colored urine
• Pale or very dark stool (less commonly)
• Signs that accompany jaundice: reduced appetite, vomiting, diarrhea, lethargy, weight loss, increased thirst, and abdominal discomfort

Possible causes (ranked by likelihood)

Note: This list is a guide to likelihood and common causes—not a diagnosis.

(References: Merck Veterinary Manual — Jaundice/Icterus, IMHA, leptospirosis, gallbladder mucocele.)

Decision tree (If → likely → action)

• If yellow gums/eyes + pale gums or rapid breathing → likely IMHA or severe anemia → action: emergency vet now (possible blood transfusion, diagnostics: PCV/TS, CBC, blood smear, coagulation profile).

• If yellow gums/eyes + fever ≥103°F (39.4°C) or recent tick/rodent/water exposure → likely infectious hepatitis or leptospirosis → action: see vet urgently (within 24 hours); bring vaccination and exposure history; tests: CBC, chemistry (ALT/AST/ALP, bilirubin), bile acids, leptospirosis testing).

• If yellowing + dark/tea-colored urine + abdominal pain or vomiting → likely hepatic or post-hepatic disease (obstruction or severe hepatitis) → action: urgent vet evaluation (within 24 hours); abdominal ultrasound often needed.

• If yellowing + progressive anorexia, lethargy, intermittent vomiting over days → likely hepatic dysfunction or chronic disease → action: schedule vet visit within 24–48 hours for bloodwork and imaging.

• If yellowing + recent exposure to onions, garlic, zinc, or certain medications → likely toxin-induced hemolysis or hepatic injury → action: contact your vet/toxicologist immediately (time-sensitive); bring packaging or samples of the substance.

• If yellowing in a young puppy within days after birth → consider neonatal isoerythrolysis or congenital disease → action: urgent veterinary assessment.

• If sudden collapse, uncontrolled bleeding, seizures, or severe difficulty breathing → likely life-threatening complication (shock, severe anemia, coagulopathy) → action: emergency clinic now.

Home assessment steps (what to check and measure)

Do these quickly and calmly; these findings help the vet:

• Check mucous membranes: lift the upper lip and look at the gums. Normal gums are pink. Yellow = jaundice. Pale/white = anemia/possible shock.
• Check the whites of the eyes (sclera) and inner eyelids for yellow.
• Check urine color: collect a small sample in a clean container; dark, tea-colored or orange urine is important to note.
• Take a rectal temperature if you can safely do so: normal 99.5–102.5°F (37.5–39.2°C). Fever concerning >103°F (39.4°C); urgent if ≥104°F (40°C).
• Measure resting respiratory rate and heart rate (if possible): resting RR >40 breaths/min or sustained HR well above normal for your dog’s size is concerning.
• Check for dehydration: tacky/dry gums, skin tenting >2 seconds suggests dehydration.
• Note appetite, vomiting frequency, diarrhea, and any changes in drinking, urination, or behavior.
• Photograph yellowing and any urine/stool color changes — these help the vet track progression.

When it's an emergency — red flags (go to ER immediately)

• Collapse, unresponsiveness, or near-collapse
• Very pale, white, or blue gums (possible severe anemia or shock)
• Severe difficulty breathing, open-mouth breathing, or severe respiratory distress
• Uncontrolled bleeding from mouth, nose, or wounds
• Repeated seizures or altered mentation (confusion, severe lethargy)
• Persistent vomiting or diarrhea with signs of shock (tachycardia, weak pulse, cold extremities)
• Jaundice with very high fever (≥104°F / 40°C) or rapidly progressing jaundice over hours

When to schedule a vet visit (non-urgent but prompt)

• New jaundice without collapse but with any of: reduced appetite, mild-moderate vomiting (1–3 episodes), diarrhea, or lethargy
• Dark urine or yellowing noticed for more than 24 hours
• Jaundice after recent medication exposure or possible toxin exposure (call within 24 hours)
• Any jaundice in a puppy, elderly dog, or a dog with pre-existing liver disease

Home care while you arrange veterinary care

• Keep your dog calm, warm, and quiet. Limit activity (rest).
• If vomiting, withhold food for 8–12 hours (but allow small amounts of water). If vomiting persists, withhold water and seek care.
• Offer small sips of water frequently; prevent dehydration.
• Do not give human medications (acetaminophen/paracetamol, NSAIDs) — some are toxic to dogs and worsen liver injury.
• Collect a urine sample and take photos of yellowing and stool/urine color to bring to the vet.
• Do not attempt to force-feed or induce vomiting unless specifically directed by your veterinarian or a poison hotline.

Tests your veterinarian will likely recommend

• CBC (complete blood count) to check for anemia and signs of hemolysis
• Serum biochemistry (ALT, AST, ALP, bilirubin, albumin) and electrolytes
• Bile acids (pre- and post-prandial) to assess liver function
• Urinalysis (bilirubin in urine, concentration, color)
• Coagulation profile if severe liver disease suspected
• Abdominal ultrasound to assess liver, gallbladder, bile ducts
• Specific infectious tests (leptospirosis serology/PCR) and blood smear
• In some cases, liver aspirate/biopsy or exploratory surgery may be needed

What to tell your vet (prepare this information)

• Exact time/date you first noticed yellowing and whether it's worsening
• Appetite, vomiting frequency (how many times and when), diarrhea, and water intake
• Urine color and frequency; any dark or tea-colored urine
• Recent medications, supplements, or human drugs given (name, dose, date/time)
• Possible toxin exposures (onions, garlic, acetaminophen, rodenticide, zinc, mushrooms)
• Vaccination status (especially leptospirosis vaccine) and recent travel or boarding
• Tick or rodent exposure, access to standing water or livestock, hunting behavior
• Breeding or pregnancy history, if applicable
• Any prior liver disease, known blood disorders, or previous transfusions
• Bring photos and a urine sample if you collected one

Final notes — stay calm, act promptly

Jaundice is a sign, not a single disease. Some causes (IMHA, leptospirosis, biliary obstruction, acute liver failure) can be life-threatening and need rapid diagnosis and treatment. Early veterinary assessment — with bloodwork and often ultrasound — improves outcomes. Use the decision tree above to decide whether you need emergency care now or an urgent appointment within a day or two.

Primary reference: Merck Veterinary Manual (Jaundice/Icterus, IMHA, Leptospirosis, Gallbladder Mucocele).

Frequently Asked Questions