What condition is indicated by a dog having both increased urination and increased appetite?

The condition characterized by both increased urination and increased appetite in a dog is commonly associated with Cushing's disease, also known as hyperadrenocorticism. This disorder arises from an overproduction of cortisol, a hormone that affects various bodily functions.

In Cushing's disease, the elevated cortisol levels lead to several physiological changes. Increased urination, or polyuria, occurs because cortisol inhibits the action of antidiuretic hormone (ADH), which normally helps the kidneys reabsorb water. As a result, the dog may drink more water (polydipsia) to compensate for the increased loss of water through urine.

Concurrently, as cortisol affects metabolism, it can lead to heightened hunger or increased appetite (polyphagia) due to the body's attempts to secure more energy despite the metabolic disturbances caused by high cortisol levels. Dogs with Cushing's often appear to have a seemingly insatiable appetite.

While conditions like hyperthyroidism and diabetes mellitus can also cause increased urination and appetite, they are typically accompanied by additional distinct symptoms that differentiate them from Cushing’s disease. For example, hyperthyroidism usually causes weight loss despite increased appetite, while diabetes mellitus generally includes symptoms like lethargy and inappropriate urination