Diabetes mellitus is a common disease in which a cat’s body does not make enough insulin or has difficulty using it. This hormone is produced in the pancreas. Its job is to help move glucose from the bloodstream into the body’s cells to provide them with a source of energy. Many cats with diabetes

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Most cats will never have a serious problem with their hearing during their lives. However, several ear issues can affect cats. Many of these can cause discomfort or pain, but some may even lead to a partial loss of hearing or deafness. Ear issues in cats can have a variety of causes, including infections,

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Head shaking shows up in horses as uncontrollable shaking, jerking or flicking of the head, with no obvious physical irritation causing the condition. While some cases may be mild, head shaking can be severe enough to make a horse dangerous or unsuitable for riding. Other symptoms that may occur alongside

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A cat’s apricot-sized heart is susceptible to several problems. Some develop in young kittens while others may strike at any age. Hypertrophic Cardiomyopathy Cardiomyopathy results from a structural abnormality of the tissue around one or more of the heart’s chambers. It disrupts the heart’s normal

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Hernias A hernia is a tear in the body wall of a horse that allows the internal organs to push through to a place where they don’t belong. There are several types of hernias. They can affect horses of any age or breed. Horses may have a defect at birth (congenital) that increases the risk of a hernia,

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The skin is the largest organ in the body and serves many important functions. In spite of its usefulness, a horse’s skin can also develop redness, itchiness or hives in response to various substances in the environment. These kinds of allergic reactions can be caused by things eaten, inhaled or touched

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Hypertension, or high blood pressure, is fairly common in cats. Although it can occur on its own, it is usually a sign of other serious health problems. High blood pressure can also cause problems with other parts of the body, including the eyes, kidneys and heart. Cats are more likely to develop high

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Hyperthyroidism is a condition that causes a cat’s thyroid gland to produce too much thyroid hormone. This disease most often shows up in middle-aged and older cats. The thyroid gland is located in the neck. Thyroid hormones affect most organs in the body, so hyperthyroidism can lead to other problems

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Hypothyroidism is the natural deficiency of thyroid hormone and is the most common hormone imbalance of dogs. This deficiency is produced by several different mechanisms. The most common cause (at least 95% of cases) is immune destruction of the thyroid gland. It can also be caused by natural atrophy

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Immunodeficiency disorders in horses are rare conditions that prevent the immune system from protecting the horse against viral, bacterial or other types of infections. These disorders can affect different parts of the horse’s immune system. They may be present at birth or develop later on in the horse’s

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The kidneys have two important roles in a cat’s body. First, they filter wastes and toxins from the blood, which then exit the body in the urine. The kidneys also help regulate the volume of fluids in the body and important hormones and other chemicals. Cats can develop several kinds of kidney issues,

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Horses are rarely prone to kidney or liver problems. Damage to both organs is much less common in horses than it is in cats or dogs. However, some aging horses do suffer from progressive and irreversible diseases of the liver or kidneys. Unfortunately, problems with these organs are seldom diagnosed

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The liver is a very important organ. It is involved in digestion and removing harmful toxins from the blood. Cats can develop several conditions that affect how well their liver works. Cholangiohepatitis One of the most common causes of liver disease in cats is cholangiohepatitis. In this condition,

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A liver shunt is also named a PSS, portosystemic shunt, portacaval shunt or portosystemic vascular anomaly. This abnormality occurs when a pet's venous blood from the intestine bypasses the liver. In the normal pet, blood vessels pick up nutrients from ingested material in the intestine and carry it

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Metabolism in horses — and in other animals — refers to all the body’s complicated processes that break down food, drink and drugs to provide nutrients and energy for living. Anabolic reactions generally happen soon after eating, to build structural parts of the body, such as muscles. Catabolic

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Cats can suffer from several conditions of nose, sinuses and other parts of the upper respiratory tract. These include nasopharyngeal polyps—a type of non-cancerous growth—and inflammation of the membranes of the nasal passages and sinuses. Nasopharyngeal Polyps A nasopharyngeal polyp is a mass of

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