Obesity may be the number one health problem for domestic pets today. Obesity is an extremely common problem with pet Chihuahuas, as with humans, and can be detrimental to the health of your dog. An overweight Chihuahua has many added stresses upon his body and is at an increased risk of diabetes, liver problems and joint pain.

Obesity develops when energy intake exceeds energy requirements. The excess energy is then stored as fat. Once a pet is obese, he may remain obese even after excessive caloric intake stops. The majority of cases of obesity are related to simple overfeeding coupled with lack of exercise.

Certain groups of dogs appear more prone to obesity than others. Specific breeds (Labrador Retrievers, Chihuahuas and Pugs, for example) and older dogs are particularly prone.

Is your dog a hog? As a subjective assessment of body condition, you should be able to feel the backbone and palpate the ribs in an animal of healthy weight. If you cannot feel your pet's ribs without pressing, there is too much fat.

Also, you should see a noticeable "waist" between the back of the rib cage and the hips when looking at your pet from above. Viewed from the side, there should be a "tuck" in the tummy, the abdomen should go up from the bottom of the rib cage to inside the thighs. Dogs who fail these simple tests may be overweight.

We recommend that you consult your Chihuahua's vet before starting any weight loss program, which should include these major areas:

• Correct Diet
  
  Overweight animals consume more calories than they require. Work with your veterinarian to determine your pet's caloric requirements, select a suitable food and calculate how much to feed. The diet should contain a normal level of a moderately fermentable fiber and the type of fat that prevents the skin and coat from deteriorating during weight loss. Diets that dilute calories with high fiber lead to increased stool volumes, frequent urges to defecate and variable decreases in nutrient digestibility.
  
  
• Exercise
  
  Increasing physical activity can be a valuable contributor to both weight loss and maintenance. Regular exercise burns more calories, reduces appetite, changes body composition and will increase your pet's resting metabolic rate.
  
  
• Owner Behavior Modification
  
  A successful weight management program requires permanent changes in the behaviors that have allowed the pet to become overweight. Perhaps you are giving your pet too many treats, for example, or not giving him enough opportunities to exercise.

Are you committed to your pet's weight loss? Here are some important things you can do:

1. Remove the pet from the room when the family eats.
   
   
2. Feed your pet several small meals throughout the day.
   
   
3. Feed all meals and treats in the pet's bowl only.
   
   
4. Reduce snacks or treats.
   
   
5. Provide non-food related attention.