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| | Some Common Dog Diseases |
 | | may occur in 1 percent of all dogs; heart disorders may lead to secondary disease diseases such as pneumonia, accumulation of fluid in body cavities, laboured breathing, edema; heart failure occurs |
 | | common symptoms include skin inflammation and loss of hair; causative agents include nutritional deficiencies, bacterial infections, hypothyroidism, allergies, hormone imbalances, and parasites (e.g., fleas, lice, mites, fly larvae, and ticks) |
 | | a group of eye diseases in which the retina and optic nerve are damaged; certain breeds have a hereditary tendency for the disease; other breeds develop glaucoma as a result of other eye disorders |
| www.pets.ca /articles/article-dogdiseases.html (436 words) |
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