Ehrlichiosis is a severe tick-borne disease that affects pets, particularly dogs. Caused by the bacteria Ehrlichia, it is transmitted through the infected tick bite, such as the brown dog tick. Symptoms in pets can include fever, lethargy, weight loss, swollen lymph nodes, and abnormal bleeding. If left untreated, ehrlichiosis can lead to severe complications like chronic infections and organ damage. Early treatment and detection with antibiotics are crucial. Preventive measures, including regular tick control and prompt removal of ticks, are essential to protect pets from this potentially life-threatening disease.