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Cystitis
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Cystitis is a bacterial infection that affects the lining of the bladder, according to Web MD. It mainly affects older dogs or animals with diabetes. The symptoms are frequent painful urination, bloody or cloudy urine, and vaginal discharge. Cystitis leads to bladder infections if left untreated. Antibiotics are used to clear up the infection.
Cushing's Disease
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Cushing's disease is a disorder of the pituitary and adrenal glands that causes the body to overproduce certain hormones. It mainly affects middle aged and older dogs. The most evident symptom is excessive water consumption and urination, according to Pet Education. Other symptoms include increased appetite, hair loss, and a pot-bellied appearance. Cushing's disease is treated through medication or surgery.
Diabetes Mellitus
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Dr. Leah Cohn, in an article on the website Pet Place, explains that diabetes mellitus affects middle-aged and older dogs. The symptoms are increased thirst and urination, weight loss, a lack of energy, and unexpected blindness. Daily insulin injections control the symptoms of diabetes mellitus.
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Frequent Urination in Italian Greyhounds
According to the Canine Inherited Disorders Database, Italian greyhounds have no notable breed-related inherited disorders that cause excessive urination. However, the breed is subject to the same infections and disorders that cause frequent urination in all dogs.