Every living thing needs protein,
fats, carbohydrates, vitamins, minerals, and water to live, but the quantities
of each nutrient vary with the amount of physical or mental stress placed
on the organism. Thus athletes need more protein for muscle development,
fats and carbohydrates for sustained energy, vitamins and minerals for
efficient conversion of fats and carbohydrates to energy, and water to
replace that which is lost through perspiration than non-athletes. Young
puppies need relatively more nutrients than adults do; moderately active
adults need more nutrients than sedentary ones; and malnourished or sick
dogs need more nutrients to regain health.
Canine nutrition
Dog foods in addition to protein, fats and carbohydrates
also must contain vitamin and mineral supplements in balanced concentrations.
Too much of one mineral may interfere with absorption of another; too little
of a mineral may interfere with vitamin use or other mineral use. Major
dog food companies make every effort to provide balanced proportions of
vitamins and minerals for maximum benefit to the dog. Find
out what to be aware of in commercial dog food.
Dogs will do well on any one of several dry dog foods,
depending on his level of activity, his metabolism, and his individual
body chemistry. Because of the requirements of a healthy coat many owners
find that some dogs do best on a diet that is high in protein and fat content.
If your dog is doing well on the food you are feeding do not switch. If
you have skin problems that cannot be traced to an obvious cause such as
fleas, consider a food with a higher fat content or one of the hypoallergenic
foods.
Understanding Ingredients
No matter the ingredients in a dog food, most important is
to supply nutrients in a form the dog can use to translate into growth,
energy, and body repair. Nutrients are chemicals ingested by living organisms
that are necessary for survival. The six basic nutrients needed by living
things are protein, carbohydrate, fat, vitamins, minerals, and water. Fats,
carbohydrates, and water are made of carbon, hydrogen, and oxygen molecules
in different configurations; proteins include these elements and nitrogen.
Minerals are themselves elements; vitamins are complex chemicals of different
composition necessary for various life processes.
Proteins are chemicals made up of other chemicals
known as amino acids. Dogs can manufacture some amino acids in their bodies
and must be supplied others in their food. Proteins from animal sources
-- meat and meat byproducts -- are more complete and easier to extract
and digest than proteins from plant sources. Proteins form the enzymes
that metabolize food into energy as well as the hormones that guide various
body functions. They themselves can also be metabolized to provide energy.
High protein feeds are recommended for puppies and working dogs, but too
much protein can cause renal (kidney) disease and has been implicated in
some temperament problems.
Fats are probably the most misunderstood of the
nutrients, for they are popularly considered the cause of obesity. It is
true that a food high in fat will cause obesity in a dog that has a low
expenditure of energy, for fats are higher in calorie than either protein
or carbohydrates. However, fats are essential for good health, particularly
of the skin. Today's homes are well-heated and have dry air that can exacerbate
dry skin conditions; the addition of Omega fatty acids to dog diets either
in the formula or as a supplement, can help keep skin pliable and healthy.
Fats increase the palatability of food, provide a media for fat-soluble
vitamins, and affect food storage. They also are essential for healthy
coat and skin, reproductive efficiency, and kidney function.
Carbohydrates should make up about 50 percent of
a balanced food for dogs. The source of carbohydrates is an important consideration;
corn is the most popular choice, with soybeans a close second. Other sources
include rice and wheat. As long as the carbohydrate source is clean and
of good nutritional quality, that is, it does not consist of floor sweepings
or come from a poor quality harvest, it probably does not matter. Some
dogs may be allergic to one or more of these sources, and some dogs may
experience bloating or flatulence on soybean formulas, but most dogs do
well on most sources of carbohydrate.
Vitamins and minerals are necessary for proper
absorption of fats and carbohydrates and for the chemical reactions in
the body. Not only do organisms need these nutrients, but also they need
them in proper amounts and ratios for optimum health. For example, unless
calcium and phosphorus are in balance, neither will be properly absorbed
or utilized, which can lead to bone or muscle problems. Some dogs may need
vitamin or mineral supplements at some time during their lives. Some breeders
give extra Vitamin C to dogs recovering from injury and boost bitches with
Vitamins C and E during pregnancy. However, dogs manufacture their own
Vitamin C, so this may be redundant. Dogs with dry skin may benefit from
daily doses of Vitamin E, and dogs under stress or bothered by fleas or
biting flies may improve if given Vitamin B complex. The operative word
is "may"; brewer's yeast, that oft-touted, but essentially effective treatment
for flea problems is high in B-complex vitamins.
Vitamins are divided into fat-soluble and water-soluble
types. Water-soluble vitamins are excreted from the body if they are not
used; fat-soluble vitamins are stored in fatty tissue.
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Water-soluble vitamins are the B complex, including
thiamin, riboflavin, pantothenic acid, niacin, pyridoxine, biotin, folic
acid, choline, and B12, and C, ascorbic acid. B-vitamins help convert food
to energy; C can be manufactured by the dog and supplementation is not
necessary. However, some breeders insist that Vitamin C is helpful for
dogs that are under stress.
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Fat-soluble vitamins are A, D, E, and K. They are
involved in several body functions, including eyesight, bone formation
and strength (with calcium), cell stability, and blood coagulation. Vitamin
K can be synthesized by bacteria in the dog's intestine and does not need
to be added to the diet under ordinary circumstances. Deficiencies of Vitamin
E can cause muscle tissue breakdown, reproductive failure, and impairment
of immune response. Vitamin A deficiency can cause several eye problems,
including dryness, corneal ulceration, and inflammation of the conjunctiva.
Vitamin D deficiency causes rickets.
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Fat-soluble vitamins can build up in tissues and become toxic.
Excess Vitamin A can lead to bone disease; too much Vitamin D can cause
calcification of soft tissue, lungs, and kidneys. Evidence of toxicity
in Vitamin E overdose is sketchy; there may be some adverse effects on
blood coagulation or thyroid function, but more study is needed to ascertain
the extent of such effect.
Minerals are essential for bone formation, muscle
metabolism, fluid balance, and nervous system function. Minerals are divided
into major and trace concentrations. Calcium and phosphorus are necessary
in particular ratio for bone formation and strength. An imbalance in the
ratio will cause bone problems. Potassium is found within tissue cells
and is important in cellular activity; a deficiency causes muscle weakness
and heart and kidney lesions. Sodium is found in fluids outside the tissue
cells and performs a function similar to potassium. It is usually found
in the diet as sodium chloride -- salt -- and is rarely deficient. Excess
sodium has been linked to hypertension in dogs. Magnesium is found in soft
tissue and bone; it interacts with calcium to provide proper heart, muscle,
and nervous tissue function and aids in metabolism of potassium and sodium.
Deficiency leads to muscle weakness and sometimes convulsions.
Preservatives are necessary in foods that contain
animal fats to prevent rancidity. The fats are used in dry kibble for palatability,
a source of fatty acids, and a carrier for fat-soluble vitamins can cause
dog food to become toxic if they break down. Dog food manufacturers use
several chemicals called antioxidants to prevent that breakdown, including
BHA, BHT, ethoxyquin, and Vitamins C and E.
Vitamins are used in all natural and organic foods. They
are more expensive than other chemicals and not as efficient at the job.
Foods preserved with vitamins have a shorter shelf life than food preserved
with BHA, BHT, and ethoxyquin.
Which Dog Food To Choose
If a dog food is balanced and provides
the proper amount of essential nutrients which of the dozens of brands
and hundreds of formulas should be chosen for your dog?
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The food must contain nutrients in usable form. Proteins,
carbohydrates, vitamins and minerals are no good if they can not be absorbed.
Here is where the difference between cheap foods and more expensive formulas
is greatest. The higher-priced diets are more likely to have balanced and
usable nutrients.
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It must be palatable to the dog. If your dog does not like
it, it does not matter how well balanced it is.
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Your dogmust remain healthy while eating the food. If his
skin is dry, he is losing or gaining weight, has stomach gas or flatulence,
consider changing his diet.
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The food must contain nutrients in usable form. Proteins,
carbohydrates, vitamins and minerals are no good if they can not be absorbed.
Here is where the difference between cheap foods and more expensive formulas
is greatest. The higher-priced diets are more likely to have balanced and
usable nutrients.
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It must be palatable to the dog. If your dog does not like
it, it does not matter how well balanced it is.
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Your dog must remain healthy while eating the food. If his
skin is dry, he is losing or gaining weight, has stomach gas or flatulence,
consider changing his diet.
Major dog food manufacturers make every effort to provide
a balanced diet of proper nutrients in usable form, but in the end the
choice of a dog food is personal, preferably done as a result of careful
consideration.
Types of Dog Food
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Dry food or kibbles are made from dough of grain flours,
meat meals, dairy products, and vitamins and minerals baked in large pans
and broken after cooking. Many kibbled foods are prepared in a mixing pressure
cooker and the resulting dough is extruded through a die and expanded with
steam and air into small, porous nuggets. These nuggets are coated with
a liquid fat, carbohydrate, or milk product for added calories and palatability.
These feeds must be at least 40 percent carbohydrates in order for the
process to work and must be packaged in bags with a grease barrier of impermeable
material such as plastic-coated paper.
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Semi-most foods are cooked combinations of soybean
meal, sugar, fresh meat or meat by-products, animal fat, preservatives,
and humectants (wetting agents that allow the product to stay moist but
not spoil). The dough is extruded into a variety of shapes to resemble
ground meat or chunks of meat to appeal to the buyer; the dog does not
care. The coloring in semi-moist foods can turn the dog's stool reddish.
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Canned foods come in four types: ration, all animal
tissue, chunk-style, and stew. The ration foods are ground and cooked into
a liquid, then canned. The animal-tissue foods are not liquefied before
canning and may include chunks of identifiable by-products such as arteries.
Chunk-style foods are ground and shaped into chunks to disguise the by-products,
then covered with gravy before the can is sealed. Stews are designed to
please the owner. In each of these types, the filled cans are sterilized.
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Frozen dog food is available in limited distribution.
This is a meat-based food with no preservatives, made with fresh meat.
It generally contains a sweetener such as cane molasses that adds to the
caloric content. It must be kept frozen until ready to use and the unused
portion must be kept refrigerated.
Supplements
Many nutritionists and veterinarians feel that a dog being
fed a balanced diet that meets its requirement for nutrients does not need
any supplements of vitamins or minerals. Some go so far as to say that
supplements can unbalance the diet by disrupting the necessary relationship
between vitamins and minerals. Some breeders disagree and regularly supplement
their dogs with one of a variety of products promoted for healthy coats
and skin, bone growth, reproductive capacity, etc.
Some owners who have dogs with dry skin may add a teaspoon
or tablespoon of corn oil to their pet's dinner, but many nutritionists
think that this adds only calories and that a food higher in essential
fatty acids will take care of the skin. Some owners purchase essential
fatty acids in a bottle and add that to the food.
Some owners think growing puppies need extra calcium and
add it in the form of bone meal. But this can do more harm than good, for
calcium must be in balance with phosphorus and magnesium in the diet, and
an overabundance of calcium can cause a myriad of problems.
Most dogs will do well when fed good quality dry dog food;
occasionally add some canned or frozen food, some meat broth (no salt added),
or a bit of liver for a treat; and avoid supplements unless recommended
by a veterinarian.
Those owners who would like to cook their own food at
home should contact a nutritionist for a recipe to make sure the ration
is balanced.
Feeding Your Puppy
Puppies should be feed three times a day until they are three
months old. They should be then feed two times a day for the rest of their
lives. If you are feeding a dry kibble you may wish to soak the kibble
in water to soften this for younger puppies. By the time they are three
to four months old they should be eating the kibble dry or with a little
canned food mixed in. Look for a kibble that comes in small bites. Feeding
a dry kibble will help with teeth and gum problems.
Feeding the Older Dog
As you dog becomes a senior citizen his nutritional requirements
may change. As he gets older he will naturally be less active than he was
as puppy and young adult and therefore may need less energy from his diet.
A special diet is sometimes needed for him as he grows elderly. Adjustment
in the content of protein he gets might be needed as organs can become
less efficient in dealing with food. Many of the major brands of dog food
have formulas available for the elderly dog.
Obesity
Obesity in dogs is a serious medical problem. Fat dogs are
more at risk in surgery, more prone to injury, and have more stress on
their heart, lungs, liver, kidneys, and joints. Fat complicates diseases,
injuries, and surgery and stresses the body. Health factors associated
with obesity include skeletal stress, cardiopulmonary disease, interference
with normal reproductive functions and puppy delivery, complications to
diabetes, difficulty in regulating body temperature, and potential inflammation
of the pancreas. Surgery takes longer if the veterinarian has to work his
way through layers of fat, and obesity complicates drug therapy, anesthesia,
and recovery from injury.
Approximately 25-30 percent of dogs either suffers from
obesity or is at risk of becoming obese. Dogs become obese because they
take in more calories than they use. They will eat themselves into oblivion
if given half a chance, so you must be on your toes.
To avoid overweight, tailor the dog's diet to his activity
level, walk the dog daily, and cut back on treats, especially high fat
treats. Do not depend on the dog to exercise himself in the back yard;
like most people, dogs will not exercise sufficiently without some incentive
to do so. A regular schedule of walks and a lower calorie diet will help
avoid obesity in spayed and neutered dogs.
To return a dog to a healthy weight, work with a veterinarian
to rule out hormonal problems, determine the dog's optimum weight, and
devise a feeding schedule that will achieve that weight with a minimum
of stress on the dog. Some dog food companies have a special formula for
overweight dogs that contain fewer calories. If the dog is very hungry,
a diet high in moisture may do the trick because it provides more volume.
Treats
There are many commercially prepared dog biscuits that make
excellent rewards and snacks. There are also preserved packaged meat products,
either beef or lamb based, in rolls that can be cut into small bites for
treats. You can find these products at most stores that carry dog food.
Care should be taken not to overfed these treats so that your dog will
not eat its regular diet.
Those interested in healthy foods will find that dogs
like vegetables such as raw carrots and broccoli cut up into little bits.
dogs seem to like the crunchy taste of these treats, which are also excellent
stimulation for the gums.
Sliced beef liver and a bunch of garlic (the kind that
comes cut up in a bottle) boiled until the beef liver is cooked through
(30 minutes) makes an excellent homemade treat. The resultant liver is
quite messy which can be solved by placing on a baking sheet in the oven
at 250 degrees and bake, turning once until each side is dried out -- but
not dried to the point of the entire piece being hard. Cut this up into
little bits and keep in refrigerator. dogs love this -- but you do need
to use care to not give them too much as it can cause diarrhea.
And alternative to beef liver is beef hearts. Basically
cook this the same way as the liver above. As your butcher for beef hearts
or ask them to special order for you. They are usually quite inexpensive.
You may need to buy a whole heart but the butcher will usually cut up for
you and you can freeze until needed. When cooked this tastes much like
roast beef and again the dogs love this treat. Beef heart treats do not
cause diarrhea that that comes with the liver treats. |