H - Hem

Hep - Hi

Ho - Hor

Hos - Hy

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Hepatic Lipidosis: A disease of the liver which can be fatal. Most commonly found in obese cats that are anorexic and have rapidly lost weight.

Hepatitis: Inflammation of the liver, caused by infectious or toxic agents and characterized by jaundice, fever, liver enlargement, and abdominal pain.

Hereditary: Transmitted or capable of being transmitted genetically from parent to offspring: a hereditary disease.

Herpes Virus: A highly contagious viral disease causing upper respiratory disease (URIs) in cats.

Himalayan Cat: A breed with extremely long, fluffy fur and the points of a Siamese cat.

Hip Dysplasia: Abnormal formation of the hip joint. Although long recognized in dogs, hip dysplasia has only recently been studied in cats, and certain breeds may be more prone to the condition.

Histamine: A physiologically active amine, C5H9N3, found in plant and animal tissue and released from mast cells as part of an allergic reaction in humans. It stimulates gastric secretion and causes dilation of capillaries, constriction of bronchial smooth muscle, and decreased blood pressure.