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Gastrointestinal (GI) obstruction is a general term for a blockage anywhere along the GI tract. The causes range from a hairball that's plugging up the intestines to a tumor that's grown large enough to obstruct the rectum.

Gastrointestinal (GI) parasites are worms and protozoa (one-celled organisms) that take up residence in your dog's stomach and intestines. Depending on the dog's age, her level of immunity, and the number of parasites present, the infection can range from unnoticeable to life-threatening. Symptoms include diarrhea, vomiting, weight loss, and a failure to grow and thrive.

Glaucoma is a disease characterized by increased fluid pressure within the eye. Healthy eyes continually produce and drain this fluid, called aqueous humor, to maintain a constant intraocular pressure (IOP). If the drainage network becomes obstructed, IOP increases significantly, causing extreme pain and often blindness.

What is Giardia?
Giardia is sometimes confused with "worms" because they invade the gastrointestinal tract and can cause diarrhea. Giardia is a one-celled parasitic species classified as a protozoa.

What is a gastrostomy tube?
A gastrostomy tube is a rubber feeding tube that enters the stomach through the skin. It goes directly into the stomach to deliver food and water to the patient.