Obesity in Cats

Obesity in Cats

By: Dr. Rebecca Remillard

Section: Veterinary Care In-depth

Diagnosis In-Depth

Your veterinarian will want to determine the cause of your cat's obesity before deciding upon treatment. Diagnostic tests that your veterinarian may wish to perform include:

  • A thorough physical examination, including an accurate measure of body weight and an assessment of body condition score.

  • Assessment of your cat's current daily intake of all food, treats, snacks, table foods and exercise schedule.

  • Routine blood work consisting of a complete blood cell count, serum profile and urinalysis. If the results are normal, obesity is probably the result of excessive caloric intake and decreased energy expenditure. However, if the results of these routine tests indicate a potential problem, additional tests are warranted to specifically identify the condition.


    Additional diagnostic tests may include:

  • Blood and urine glucose levels: Diabetes mellitus can be diagnosed based upon detecting high blood glucose level and the positive detection of glucose in the urine. Sometimes a series of blood glucose measurements are needed to confirm the diagnosis.

    Treatment In-Depth

    Therapy recommendations are dependent upon the underlying cause of the obesity. Take your cat to your veterinarian for a complete work-up before beginning a weight loss program to rule out major diseases.

    Recommendations for obesity due to:

    Excessive caloric consumption

  • Lower your pet's daily caloric intake by 50 percent of that required for her ideal body weight.

  • Change the pet food product to one designed for weight loss and containing:

    - less than 360 kcal per 100 grams of food on a dry matter basis.

    - between 7-12 percent fat.

    - between 10-30 percent crude fiber.

    - greater than 35 percent crude protein.

  • Feed your pet a prescribed measured amount of food several times daily.

  • Give treats only as directed. Use specifically designed low calorie treats or give cooked or raw vegetables.

  • Increase exercise activity.

  • Try getting your pet to swim. Swimming is an excellent exercise for patients with orthopedic disabilities. Unfortunately, many cats hate water and swimming.

  • Return to your veterinarian for monthly visits for a weight check and appropriate adjustments in meal size.

    Diabetes mellitus

  • Often in the management of diabetes, a dietary change to a veterinary therapeutic diet is necessary for controlling blood glucose levels. The food should contain a moderate level of fiber (5-10 percent) with lowered levels of readily available carbohydrates.

  • Insulin treatments are individualized to the patient.

  • In some cases of feline diabetes, when the cat loses weight the clinical signs of diabetes resolve and occasionally insulin treatments are no longer needed.

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