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  • Keratoconjunctivitis sicca (KCS) is also commonly referred to as dry eye. It is an uncommon eye condition in cats. It results from inadequate production of the watery portion of the tear film by the lacrimal gland or the third eyelid gland. Cats with KCS have painful, red, eyes with squinting. Corneal ulcers may also be present. Chronic cases have scarring on the cornea, impairing vision. The prognosis for cats diagnosed with KCS is good with long-term treatment and diligent monitoring.

  • Keratoconjunctivitis sicca (KCS) is also commonly referred to as dry eye. It is a common eye condition resulting from inadequate production of the watery portion of the tear film by the lacrimal gland or the third eyelid gland. Dogs with KCS have painful, red eyes with a thick yellow discharge. They may have secondary infections or corneal ulcers. Chronic cases have scarring on the cornea, impairing vision. The prognosis for dogs diagnosed with KCS is good with long-term treatment and diligent monitoring.

  • Kidney disease is relatively common in birds, especially budgies, and may present as an acute or chronic problem. Some of the clinical signs are very characteristic of kidney disease but many others are non-specific. This handout explains these signs, as well as how kidney disorders in birds can be diagnosed and treated.

  • The lacrimal duct is part of the nasolacrimal system, a series of narrow tubes that allow tears to drain from the eye into the nose and mouth. This duct can sometimes become blocked or fail to develop properly, resulting in tears overflowing and potentially staining the face below the eye. The clinical signs, diagnosis, and treatment options for the condition are explained in this handout.

  • The lacrimal duct is part of the nasolacrimal system, a series of narrow tubes that allow tears to drain from the eye into the nose and mouth. This duct can sometimes become blocked or fail to develop properly, resulting in tears overflowing and potentially staining the face below the eye. The clinical signs, diagnosis, and treatment options for the condition are explained in this handout.

  • Lameness is an inability to properly use one or more limbs due to pain or weakness. The most common causes of sudden lameness in dogs are soft tissue injury (strain or sprain), injury to a joint, bone fracture, or dislocation. Your veterinarian will determine the best course of action based on your pet's condition, a detailed examination, and the results of diagnostic tests. Definitive diagnosis of the cause can be difficult. In some cases, a trial with anti-inflammatory medications and rest may be necessary.

  • Laryngeal paralysis is a condition that causes dysfunction of the larynx causing reduced ability to breathe deeply and can obstruct the airway. It can be a congenital condition of young dogs or may be due to a neuromuscular disease in older dogs. Clinical signs include coughing, noisy breathing, and exercise intolerance. A definitive diagnosis is made through an examination of the larynx with an endoscope or laryngoscope. Treatment of mild cases involves environmental management to reduce any stress on the larynx and medications used for flareups. More severe or congenital cases require surgery.

  • Leaky gut syndrome refers to an increase in the permeability of the intestines. This condition may be caused by any significant damage to the intestines. Acute cases of leaky gut may be caused by infection, trauma, toxins, or medication overdoses. Chronic cases, in contrast, may be caused by food allergies, long-term NSAID use, or other causes. Treatments will be targeted at the underlying disease causing your cat's leaky gut.

  • Leaky gut syndrome refers to an increase in the permeability of the intestines. This condition may be caused by any significant damage to the intestines. Acute cases of leaky gut may be caused by infection, trauma, toxins, or medication overdoses. Chronic cases, in contrast, may be caused by food allergies, long-term NSAID use, or other causes. Treatments will be targeted at the underlying disease causing your dog's leaky gut.

  • Leishmaniasis is a disease caused by a protozoan parasite transmitted by sandflies and is most commonly seen in the Mediterranean, Middle East, and South and Central America. It has been reported in some parts of the United States. Clinical signs include hard skin nodules, weakness, decreased appetite, vomiting, diarrhea, and more. Diagnosis is based on travel history, clinical signs, and diagnostic testing. The goal of treatment is to resolve clinical signs. Prognosis is guarded to grave depending on the severity of the disease.