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What are the causes of increased thirst and urination?
These clinical signs are non-specific and can be caused by many different diseases or conditions. Usually it is the production of excess, dilute urine that results in a compensatory increase in water consumption, but occasionally the condition is one of increased water intake resulting in the production of large volumes of dilute urine.

What might be the cause of abdominal enlargement?
The causes of abdominal enlargement include an increase in intra-abdominal fat due to simple overall weight gain as a result of excess calories or insufficient exercise. A redistribution of fat into the abdominal cavity may occur with Cushing's disease. Dogs suffering from hypothyroidism often gain weight, as do some dogs with insulinomas (tumors of the insulin producing cells of the pancreas). This weight gain may be perceived as abdominal enlargement.

What does fever of unknown origin mean?
This is a term that is generally used to refer to a persistent fever of greater than 39.7 °C, for which the underlying cause is not readily evident.

What could be the cause of bleeding?
One of most common and obvious causes of bleeding (hemorrhage) is trauma. In most instances the bleeding will be self-limiting (stop on its own) unless the wound is severe. Occasionally bleeding may occur from sites such as the nose, mucous membranes, or urinary tract, but no incidence of trauma has occurred. Or perhaps 'pin point' hemorrhages are found on the gums or skin (these are called petechiae). These more troublesome clinical signs may be associated with problems related to blood coagulation factors, platelets, platelet function, or some other underlying disease.