Summary: CC 38TM/MC (dry), CALORIE CONTROL CCTM/MC IN GRAVY (pouch), and CALORIE CONTROL CCTM/MC IN GEL (canned) are highly palatable, complete diets for adult cats. The diets are formulated to promote weight loss in overweight or obese cats and should be used as part of a weight reduction program in combination with behavioral management and, when possible, an exercise program.

INDICATIONS:

CONTRAINDICATIONS:
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For weight loss in overweight or obese adult cats
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Growing kittens
   
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Pregnant or lactating queens

RATIONALE:
Obesity is considered to be the most common form of malnutrition encountered in small animal practice. Indeed, studies have suggested that as many as 40% of cats seen in practice are either overweight or obese. Obesity is the result of energy intake in excess of requirements.

Quantification of Obesity:
Until recently, the easiest means of assessing obesity in cats was with visual observation and physical palpation (body condition scoring). Waltham has developed a new method of estimating the percent body fat by taking two physical measurements. Both measurements should be obtained with the cat in a standing position, the legs perpendicular to the ground, and the head in an upright position.

1. The ribcage i.e., the circumference measured (in cm) at the point of the 9th cranial rib
2. The leg index measurement (LIM) is the distance (in cm) between the patella (knee) and the calcaneal tuber (hock) of one posterior limb

The percent body fat can then be calculated from the following equation:

% Body Fat = (((ribcage/0.7067) - LIM)/0.9156) - LIM)

Which can be simplified to % body fat = 1.5(Ribcage – LIM) – 9.

Cats with more than 30% body fat are considered overweight or obese and are candidates for a veterinary-supervised weight loss program. The dietary management of obesity involves restricting energy intake while still delivering all essential nutrients to the cat.

Dietary Therapy:
Since excessive energy intake is the major cause of obesity, dietary therapy focuses on restricting energy consumption. Although starvation (total energy restriction) to reduce weight is a technique that may be employed in some species, it should not be considered an option in the cat because of the link between anorexia and the development of idiopathic hepatic lipidosis. For this and other reasons, the recommended dietary approach is one of controlled moderate energy restriction.

There are two ways of restricting energy delivery to an overweight cat: by feeding less of the cat’s regular diet or by feeding a specially designed weight loss diet. Maintenance diets are balanced for normal energy intake. When the intake of a maintenance diet is restricted, the intake of all essential nutrients is also restricted. This approach can lead to deficiencies in protein, vitamins, minerals, and essential fatty acids which could have serious health consequences for the cat.

The appropriate way to restrict energy delivery to an overweight cat is to feed a diet specifically formulated for weight loss. Such diets provide higher levels of all essential nutrients relative to energy so that when calories are restricted, nutrient delivery is not. CALORIE CONTROL CC 38TM/MC (dry), CALORIE CONTROL CCTM/MC IN GRAVY (pouch), and CALORIE CONTROL CCTM/MC IN GEL (canned) have levels of protein, essential fatty acids, vitamins and minerals which are increased relative to calories to avoid nutritional deficiencies during calorie restriction. Clinical studies with these diets show that when fed as directed, weight loss is achieved safely. Weight loss comes predominantly from fat, with lean tissue being preserved.

Normal Fiber Content:
Many weight loss diets contain elevated levels of dietary fiber. Some claims have been made that dietary fiber is a bulking agent which helps to control hunger. Cats are carnivores, and they have very short digestive tracts. The high levels of fiber in some weight loss diets make these diets inappropriate and unappealing to cats. Overweight cats that refuse to eat are at risk of developing feline hepatic lipidosis. Cats that do eat the high fiber diet are at greater risk of developing feline lower urinary tract disease. High fiber intake means increased stool volume with increased fecal water losses. Due to increased fecal water loss, urine volume is decreased. A reduced urine volume results in a more concentrated urine, increasing the risk of urolithiasis. High fiber weight loss diets are not a good choice for cats at risk of hepatic lipidosis or FLUTD. CALORIE CONTROL CC 38TM/MC (dry), CALORIE CONTROL CCTM/MC IN GRAVY (pouch), and CALORIE CONTROL CCTM/MC IN GEL (canned) have normal fiber levels and are clinically proven to achieve healthy weight loss when fed as directed.

Feline Hepatic Lipidosis:
Obesity and inappetance are risk factors for feline hepatic lipidosis. Clinical studies were performed to assess liver function and lipoprotein metabolism in cats fed CALORIE CONTROL CC 38TM/MC (dry), and CALORIE CONTROL CCTM/MC IN GEL (canned). At energy restrictions far more stringent than usually recommended for weight loss, no adverse effects were noted in obese cats fed these diets during the 18 weeks of the study. Plasma cholesterol, triglyceride and lipoprotein-cholesterol, lipoprotein lipase and hepatic lipase concentrations were measured. There were no biochemical or clinical parameters indicative of hepatic damage. The excellent palatability of these diets was seen as an important factor ensuring adequate energy and nutrient intake during weight loss.

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Steps for a Successful Weight Loss Program:

1.
Use appropriate diagnostic screening to eliminate other possible causes of obesity such as endocrine disorders.
2.
Counsel the owner on the need to reduce weight in order to promote health, longevity and reduce the risk of secondary disorders that may be exacerbated by excessive weight (e.g., diabetes, hepatic lipidosis, FLUTD, joint disease).
3.
Weigh the cat and set an initial, realistic target weight representing at least 85% of the initial body weight (i.e., a 15% reduction in body weight) to be achieved in approximately 18 weeks. In general, the target weight should be no more than 15% less than the pet's current weight. If necessary, repeat the program to achieve a normal body weight for the cat's breed and size.
4.

Determine the energy required for weight loss by consulting the feeding guides or by using the equation:

energy for weight loss (kcal/day) = 30 x (initial body weight in kg).

5.
Determine the amount to feed by consulting the feeding guides or by using the kcal required and kcal/cup, kcal/can or kcal/pouch provided in this guide.
6.
Define a time frame for this weight loss to occur. Most cats will achieve a 15% weight loss after 130 days (18 weeks) on CALORIE CONTROL CC 38TM/MC (dry), CALORIE CONTROL CCTM/MC IN GRAVY (pouch), and CALORIE CONTROL CCTM/MC IN GEL (canned).
7.
Set weekly or bi-weekly appointments for the cat to come into the clinic for weigh-ins (the same time of the day, using the same scale) so that progress can be tracked and positive results reinforced.
8.
If there is no loss of body weight after a 2-4 week period evaluate the patient carefully. Consider reducing the food allowance (on a kcal basis) by another 10% to a minimum allowance of energy for weight loss (kcal/day) = 24 x (initial body weight in kg).
9. Owners are more likely to be motivated to continue the program if the cat's weight is recorded after each weigh-in, and a simple graph of progress is kept up to date.
10. The calorie content of any treats or snacks should be taken into consideration when calculating the food requirements for the cat. Ideally treats, cat snacks, and table scraps should be avoided. If this is not possible, treats should be limited to less than 10% of the daily calorie intake.
11. The owner should minimize the potential for the cat to get to additional sources of food (e.g., neighbors, garbage, other pet’s food).
12. Encourage the owner to exercise the cat. Exercise increases energy expenditure and promotes the preservation of lean tissue mass during weight loss. Physical activity may be encouraged by playing with the cat and using motivational toys to promote activity.


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Special Tips:

1.
Synthesizing digestive enzymes requires energy and metabolizing food can represent as much as 10% of a cat’s daily energy requirements. Eating several small meals a day uses more energy than eating a single large one helping to expend energy during weight loss.
2.
For cats that are particularly resistant to weight loss, consider feeding CALORIE CONTROL CCTM/MC IN GRAVY (pouch), or CALORIE CONTROL CCTM/MC IN GEL (canned). Moist diets, with their increased moisture content, are often found to be highly palatable and satisfying for the cat.

 


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