If your dog suddenly seems to be draining the water bowl nonstop or your cat is pacing the house and vocalizing at all hours despite eating well, hormones may be the hidden culprit.
The study of hormones, called endocrinology, is one of the most fascinating areas of veterinary medicine. Hormones are chemical messengers produced by glands throughout the body that regulate metabolism, energy, mood, weight, and more. When they fall out of balance, the effects can be surprisingly noticeable.
The encouraging news is that most hormonal conditions are highly manageable and can often be diagnosed through advanced bloodwork performed during a house call.
The Adrenal Glands: When Stress Hormones Go Wrong
The adrenal glands sit just above the kidneys and help produce cortisol, commonly known as the “stress hormone.” Too much or too little cortisol can create major health issues.
Cushing’s Syndrome, caused by excess cortisol, is one of the most recognizable hormonal conditions in dogs. Common symptoms include excessive thirst, panting, anxiety, and a distended belly. In many cases, the condition is linked to a tiny non-cancerous tumor in the pituitary gland.
On the opposite end is Addison’s Disease, which occurs when the adrenal glands don’t produce enough cortisol. Often called “the great pretender,” its symptoms—GI upset, lethargy, and general malaise—can mimic many other illnesses and are especially common in middle-aged female dogs.
There is also a rarer adrenal tumor called a pheochromocytoma, which can trigger sudden bursts of adrenaline, rapid heart rate, flushed skin, and high blood pressure.
The Thyroid: Energy Regulation Gone Awry
The thyroid gland controls metabolism, and imbalances tend to present differently in dogs and cats.
Hypothyroidism, or too little thyroid hormone, is common in dogs, particularly Golden Retrievers. Affected dogs often gain weight unexpectedly, move through life with low energy, and develop what veterinarians affectionately call a “tragic face” expression.
In cats, hyperthyroidism is far more common. These senior cats are often ravenously hungry while continuing to lose weight. They may also become increasingly vocal or restless. Treatment options can include medication, topical therapies, or targeted radiation treatment.
The Pancreas: Sugar and Insulin
The pancreas produces insulin, the hormone responsible for regulating blood sugar. When insulin production or response becomes impaired, diabetes develops.
In dogs, diabetes closely resembles Type I diabetes in humans, where the pancreas does not produce enough insulin. Symptoms often include increased thirst, urinary accidents, weight loss, cataracts, and recurring urinary tract infections.
Feline diabetes more closely mirrors Type II diabetes in people and is frequently tied to obesity and insulin resistance. With proper treatment and management, some cats can even go into remission.
What This Means for Your Pet
Hormones and medications are often described as invisible chemical messengers that quietly influence nearly every system in the body.
Hormonal diseases tend to develop gradually, making them easy to overlook early on. Fortunately, many respond exceptionally well to treatment once identified. If your pet has been drinking more water than usual, gaining or losing weight unexpectedly, or simply seems “off,” a hormonal condition may be worth exploring.
Dallas Veterinary Concierge provides in-home veterinary care throughout the Dallas area; to learn more, visit dallasveterinaryconcierge.com or contact their team at info@dallasveterinaryconcierge.com.
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