Jaundice in pets

What It Is

Jaundice, also called icterus, is a yellowish tinge that appears in the gums, the whites of the eyes, the inner ears, and sometimes the skin, caused by excess bilirubin building up in the blood. Bilirubin is a normal byproduct of red blood cell breakdown that the liver processes and removes; when that pathway is overwhelmed or blocked, the pigment accumulates and tints the tissues. Jaundice can be subtle at first, especially in animals with dark skin or heavy fur, so checking the gums and the whites of the eyes in good light is the most reliable way to spot it early.

Common Causes

Liver disease, whether from infection, toxins, or cancer, is a frequent cause, as is a blocked bile duct that stops bile from draining normally into the gut. Conditions that destroy red blood cells faster than the body can replace them, including certain infections, immune disorders, and some toxins, push bilirubin levels up even when the liver itself is healthy. In horses, a brief period of reduced appetite alone can raise bilirubin slightly, which is why the vet interprets jaundice alongside other findings rather than in isolation.

When It Is an Emergency

Any jaundice noticed for the first time should be treated as urgent, since the underlying causes range from serious to life-threatening. Jaundice combined with lethargy, vomiting, dark urine, pale gums, or collapse points toward rapid deterioration and needs immediate veterinary care. Because red blood cell destruction can progress within hours in some cases, delaying a visit is one of the riskier choices an owner can make with this sign.

What the Vet Will Do

Bloodwork to check liver values, red blood cell counts, and bilirubin levels is the usual starting point, often alongside a urine test. Abdominal ultrasound helps distinguish a blocked bile duct from liver disease or red blood cell destruction, and further tests follow depending on what these findings show. Some animals need hospitalization for supportive care while the underlying cause is identified and treated.

Home Care and Prevention

There is no safe home treatment for jaundice, since managing it depends entirely on finding and treating the cause. Keep pets away from known toxins such as certain human medications, rodenticides, and toxic plants, and keep vaccinations and parasite prevention current where these reduce risk. Check gum color periodically in pets prone to liver or blood disorders, and get any yellow tinge assessed the same day it is noticed.