Hormonal Imbalances:
* Hypothyroidism: This condition occurs when the thyroid gland doesn't produce enough thyroid hormone, slowing down metabolism and leading to weight gain.
* Cushing's Disease (Hyperadrenocorticism): Excess production of cortisol can cause increased appetite, weight gain, and a redistribution of fat.
Other Medical Conditions:
* Diabetes Mellitus: This disease prevents the body from properly utilizing glucose, leading to increased hunger and weight gain despite potentially eating less.
* Polycystic Kidney Disease (PKD): This genetic condition can cause kidney dysfunction, leading to fluid retention and weight gain.
* Feline Leukemia Virus (FeLV): This virus can suppress the immune system and contribute to weight loss or gain, depending on the stage of the disease.
* Feline Immunodeficiency Virus (FIV): This virus can weaken the immune system and lead to various health problems, including weight gain.
* Certain Medications: Some medications can cause weight gain as a side effect.
Other Factors:
* Age: As cats age, their metabolism slows down, making them more susceptible to weight gain.
* Spaying or Neutering: These procedures can lead to changes in metabolism and increased appetite.
* Lack of Exercise: Cats that are inactive are more likely to gain weight.
* Breed Predisposition: Certain breeds are more prone to obesity, such as Persians and Maine Coons.
Important Note: If your cat is gaining weight despite eating a normal diet and being active, it's crucial to consult a veterinarian. They can conduct a physical examination, run blood tests, and perform other diagnostic tests to determine the underlying cause of weight gain and recommend appropriate treatment.