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One of your most important
responsibilities as a cat owner is to provide your cat with the
necessary nutrients required for its growth and maintenance. Cats
need a diet that contains protein, fat, minerals, vitamins, and
water. Those nutrients are the building blocks of various
structural body tissues; are essential for chemical reactions
(metabolism, catabolism); transport substances into, around, and
out of the body; supply energy for growth and maintenance; and
provide palatability. Basic minimum nutritional requirements for
cats have been established by the Feline Nutrition Expert (FNE)
subcommittee of the
Association
of American Feed Control Officials (AAFCO). Pet-food
manufacturers use those standards when producing cat foods.
Types of Cat
Foods
Commercial cat foods are formulated as dry, semimoist, and
canned. The products differ in water content, protein level,
caloric density, palatability and digestibility. The
differences are primarily attributed to the processing methods
used by pet-food manufacturers. A quality cat food provides the
necessary nutrients in a properly balanced proportion.
- DRY FOODS
Dry foods contain 6 percent to 10 percent moisture. Cereals,
grain by-products, bone meal, fish meal, milk products, and
vitamin and mineral supplements are combined, extruded and
dried into bite-sized pieces. The pieces are then covered with
flavor enhancers, such as digest or animal fat, giving the
product increased palatability. It takes less dry food on an
as-is basis than other types of food to satisfy a cat, because
dry food has more dry matter and a higher energy content per
gram fed. The primary advantages of dry cat food are lower cost
and convenience in allowing "free choice" feeding. Generally,
dry foods may be less palatable to a cat and have a lower
digestibility than the moister types. However, premium dry cat
foods are comparable in digestibility to grocery store brands
of canned cat foods, and can exceed lower quality canned cat
foods.
- SEMI MOIST
FOODS
Semi moist cat food may be more appealing to some cats than dry
cat food. Moisture content is approximately 35 percent.
However, after the package is opened, palatability decreases
and spoilage increases because of dehydration. These foods can
also be fed free choice. The cost is mid-range, between that of
dry and canned food. Semi moist food resembles ground- or
whole-meat tidbits. Meat and meat byproducts are the primary
ingredients. They are combined with soybean meal, cereals,
grain byproducts, and preservatives. Manufacturers add organic
acids (phosphoric, hydrochloric and malic acids) and sorbitol
and dextrose to prevent spoilage and retain moisture in
semi moist cat foods.
-
- CANNED FOODS
Canned cat food is quite popular with owners, despite its
higher cost. Canned varieties are highly palatable to cats,
which can be helpful if your cat is a finicky eater. Canned cat
food has a water content of a least 75 percent, so it is a good
dietary source of water. When unopened it has the longest shelf
life. Canned food is available in ration sizes (12 to 22 ounce
cans) or gourmet sizes (3 to 6 ounce cans). Gourmet canned cat
foods generally feature organ meats (e.g., kidney, liver) as
their primary food ingredient. Because some brands may be
nutritionally incomplete, it is particularly important to read
the nutrition labels carefully on such specialty cat-food
items. Gourmet canned foods may induce food consumption in
anorexic cats or meet increased protein requirements that occur
during wound healing or with protein-losing diseases.
Selecting Cat
Food
Reading the nutrition label on the packages is the best way to
compare cat foods. Pet-food manufacturers are required to supply
certain nutrition information on the package. Labeling
regulations are established by the AAFCO and the
United States Food and
Drug Administration (USFDA) to ensure compliance with federal
and state feed regulations. The section labeled "guaranteed
analysis" lists the percentages of protein, water, fat, fiber,
and ash. The minimum amounts of crude protein and fat and the
maximum amounts of crude fiber and sometimes ash, and water must
be listed on the label. Although this information is required, it
is of little value since it does not represent the actual amounts
of those nutrients present in the product, only minimum and
maximum amounts.
In 1993, the AAFCO approved the discretionary
listing of a cat food's caloric content on the label. Pet food
manufacturers determine the caloric content of their product by
using a standard nutrition formula based on metabolized energy
per gram from protein, fat, and carbohydrates. A food's caloric
content will help cat owners in determining how much to feed
their cats. Basically, the average adult cat needs about 30
kilocalories per pound of body weight per day. Individual needs
may differ from that average according to age, environment, and
activity level. The ingredients list includes all items used in
the product, including flavor enhancers, artificial colors and
preservatives. The items are listed in decreasing order by
weight. Meat, meat by-products, or seafood should be listed among
the first few items; that indicates that the product probably
contains enough animal-source ingredients to supply taurine and
essential fatty acids. Also, be sure that niacin and vitamin A
have been added, since those vitamins are sensitive to
food-processing methods. The nutritional claim states the stage
of a cat's life cycle for which the food is a complete and
balanced product (e.g., growth, maintenance, pregnancy). It
should also state that it meets the requirements of the AAFCO,
preferably by animal-feeding trials. Feeding a cat a product that
does not have a nutritional claim on the label cannot guarantee a
complete and balanced diet for the animal. Feeding directions are
usually provided on the label. This provides a guideline for
owners on quantity and timing of feedings. However, owners need
to adjust feeding portions to keep their cat at the ideal body
weight.
Homemade Diets
Formulating your own cat food is a difficult and time consuming
process. Also, the nutrients in the formula may not be available
in the right quantities and proportions to be beneficial to your
cat. Therefore, it is usually recommended that the cat owner use
a commercial, nutritionally balanced product, unless a
veterinarian recommends a recipe for a home-formulated ration.
Basic
Guidelines on Feeding Cats
Environmental conditions can affect a cat's eating habits. For
example, heavily trafficked areas, noise, the presence of other
animals, dirty food containers, or nearby litter boxes can
deter a cat from eating. Therefore, try to be sensitive to your
cat's eating behavior and make necessary adjustments for
optimum feeding conditions.
The amount fed is based on caloric content,
quality of nutrients, and the cat's special dietary needs. Meat
scraps from the table and specialty cat treats can be fed from
time to time but should not be a steady diet for your cat.
Those treats often lack the proper proportion of basic
nutrients a cat requires to maintain its health. A rule of
thumb is not to let treats exceed 10 to 15 percent of the cat's
daily diet. Although raw meat is an excellent source of many
nutrients, it is not recommended as food for cats, because it
is a potential vehicle for toxoplasmosis. Also, salmonellosis
can occur from contaminated meat and spoiled meat harbors
various bacteria that can upset the digestive system.
- VARIETY
Feeding your cat two or three different cat foods provides
flavor variety. It also prevents the cat from developing a
preference for a food that may not be 100 percent nutritionally
balanced. However, if your cat is already a finicky eater that
craves an unbalanced diet, you can break the habit. A good
method is to convert it to a new taste slowly by mixing the new
food with the old. Increase the amount of new to old food by
one-quarter increments (i.e., 1:4, 2:4, 3:4) until your cat
accepts the new food. However, if your cat is content with a
single nutritionally complete and balanced cat food, there
really is no reason to change its preference.
-
- VITAMIN AND
MINERAL SUPPLEMENTS
A cat food that meets or exceeds the FNE subcommittee's
nutrition standards assures an adequate supply of vitamins and
minerals in the diet. Therefore, the use of vitamin and mineral
supplements, including brewer's yeast, is unnecessary. The
addition of a supplement without a veterinarian's approval may
actually harm your cat.
- FOOD STORAGE
Refrigerate any unused portion of canned cat food, to maintain
quality and prevent spoilage until the next feeding. To prevent
possible digestion problems related to temperature differences,
refrigerated food should be brought to room temperature before
it is offered to your cat. Canned rations can be divided into
two servings per day. Store unused portions of dry cat food in
a cool, dry location, and use all the food within six months of
purchase. Lengthy storage decreases the activity and potency of
many vitamins. Storing dry cat food in an airtight container
will prevent further nutrient deterioration and help maintain
palatability.
Dietary
Considerations
Feline Lower Urinary Tract Disease (FLUTD)
Various studies have provided new dietary considerations when
feeding a cat that has had
FLUTD. The pH of the urine influences the formation
of certain specific crystals. Struvite crystals rarely form in
urine with a pH of less than 6.4, whereas they often appear
when the urine pH rises to above 7.0. Diet influences urinary
pH. For example, when dry food is available to a cat "free
choice," the cat's urine pH decreases.
Current feeding recommendations for FLUTD
cats are as follows:
- Feed diets that ensure adequate
acidification. However, do not add urine acidifiers to diets
that are already acidic. Over acidification can cause
metabolic acidosis, resulting in impaired kidney function and
mineral imbalance that includes potassium depletion. Also,
urine that is too acidic provides a good environment for
another mineral deposit (oxalate crystals) to form which can
also cause urinary obstruction.
- Provide fresh water at all times. The more
that a cat drinks, the less chance crystals and uroliths
(small mineral stone like deposits) will form.
- Restrict dietary magnesium intake to 40
milligrams per 100 kilocalories and phosphorus to 200
milligrams per 100 kilocalories if adequate urine pH (6.4 or
less) is maintained.
- Feed small meals on a frequent basis or
feed free-choice dry foods.
Special Nutritional Needs
Throughout a cat's life, there are stages in which the cat
requires different nutrients. Those include kitten hood,
pregnancy, lactation, and finally, old age. There are also
special dietary needs associated with certain
nutrition-sensitive diseases (food allergies) and chronic organ
system diseases (kidney disease, liver disease, congestive
heart failure and diabetes)
Common Feeding
Problems
Avoid these
common feeding
errors |
Overfeeding can lead to the
number-one nutritional disease, OBESITY.
Excessive body weight can increase the risk of liver disease,
heart disease, respiratory problems, and constipation.
Furthermore, fat cats are at a greater risk of developing
diabetes and arthritis. Pet food manufacturers have
formulated diets that have fewer calories per gram that may
be helpful in treating obese cats.
Feeding dog food to cats is a common
error, especially if dogs and cats are in the same household.
Dog foods are developed for the nutritional needs of dogs,
not cats. There can be serious consequences if a cat's diet
is deficient in protein, taurine, niacin, vitamin A, and
fatty acids.
Overdosing with vitamin and mineral
supplements has been known to cause severe medical problems
in cats. Physiological imbalances
caused by excess vitamins and minerals can lead to the
binding of other nutrients. Overdoses of vitamins A and D are
more common than deficiencies of those vitamins, because of
unnecessary supplementation of an already balanced diet.
Exclusively feeding meat or fish results
in an unbalanced diet and causes related nutritional
diseases. Diets containing large
quantities of fish can cause yellow-fat disease (steatitis),
a result of vitamin E deficiency. Nutritional secondary
hyperparathyroidism is usually caused by all-meat homemade
diets that are deficient in calcium, thus creating a mineral
imbalance in the calcium-phosphorus ratio. The disease most
commonly occurs in kittens that are rapidly growing.
Prepared by the Cornell Feline Health
Center, Cornell University, College of Veterinary Medicine,
Ithaca, New York 14853-6401. The ultimate purpose of the
Feline Health Center is to improve the health of cats by
developing methods to prevent or cure feline diseases and by
providing continuing education to veterinarians and cat
owners. Much of that work is made possible by the financial
support of friends. ©1988, 1994 by Cornell University. All
rights reserved. Cornell University is an equal opportunity,
affirmative action educator and employer. |
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