Dr. Dan Christian specializes in small animal medicine, with special interests in behavior and nutrition. He has been instrumental in establishing animal behavior residencies for veterinarians at leading veterinary schools and developing innovative programs with veterinary organizations in the United States. He is a member of the American Veterinary Medical Association, the American Animal Hospital Association, and the Southern California Veterinary Medical Association. During his professional career, Dr. Christian earned the American Association of Feline Practitioners Award. He has also appeared as a guest on television and radio pet health programs nationwide, and to has authored numerous articles for pet health magazines.

Q: I have a six-month-old cat. She looks like she is overweight, but a few of my friends say that once a female cat has been spayed, their "apron" sticks out a bit. Is that normal for female cats? Or is she just overweight?

A: Having a cat spayed is one of the most responsible things we can do for our cats, as it prevents uterine infections and helps prevent mammary tumors later in life. The neutering process may, however, alter the metabolism in some cats, and in turn, contribute to obesity if feeding amounts are not adjusted. Should this happen, it still does not outweigh the importance of neutering.

In cats, the inguinal fat pads (the "fat aprons" you are describing) are usually the first place to notice the weight gain. These pads are pendulous and can easily be seen in the side profile of a cat. If these pads are easily visible from the side, chances are your cat needs to lose weight. The first thing you should do is have your veterinarian examine your cat and, if a weight loss program is in order, he or she can explain to you the best way to do it safely.

At just six months of age, you need to be vigilant about your cat's weight situation, as obesity can lead to other more serious conditions, such as diabetes and cardiovascular problems. It's great that you caught it early and can get control of the weight gain by feeding your cat the appropriate type and amount of food.