12/05/2016
Understanding Dietary Requirements of Your Dog.
Dogs need a balanced diet of 6 important components
1) Protein
2) Carbohydrates
3) Fat
4) Vitamins
5) Minerals
6) Water
Protein.
Protein has many critical functions in the body, but is best known for its role in supplying amino acids to build :
Hair
Skin – A healthy skin has better immunity to fight against skin problems like fungal and or bacterial infections, skin odour, dry skin, flaky skin etc. Healthy skin helps heals wounds faster and thus offers greater protection to the dog.
Nails -
Muscles –
Tendons
Ligaments
Cartilage.
Protein also plays a main role in hormone and enzyme production. Proteins are also very important for a healthy immune system. Protein level in the body of dog is not constant but always fluctuating depending on breed, age, activity level, general health etc. As cells die and tissues wear out the dog depends on his diet for resupply of essential proteins. Accordingly the diet needs to resupply the normal loss of proteins and maintain the level of protein in the dog's body.
Proteins are broken down into amino acids. There are 22 amino acids that dogs need. Dogs are known to synthesize 12 of these and depends on its diet to supply the balance. The amino acids which the dog cannot synthesize on its own are called as essential amino acids. The essential amino acids are as under :
1) Arginine
2) Histidine
3) Isoleucine
4) lysine
5) Methionine
6) Phenylalanine
7) Threonine
8) Tryptophan
9) Valine
10) Taurine .......required for Cats. It is believed Dogs can synthesize Taurine hence is not usually supplemented in their diets.
Protein related health problems usually arise due to deficiency in amino acids.
Quality of Protein
Not all sources of Proteins are the same i.e. various Protein sources contain different levels of amino acids. It should also be noted not all proteins are readily broken down by the body. Accordingly some protein sources are better suited for dogs then others. The ability of a protein to be readily broken down by the body and the level of usable amino acids is understood as Protein Quality and is refereed to as 'Biological Value'. Egg has the highest Biological Value and sets the benchmark at 100. Fish and Milk have values of 92. Red Meat is approximately 78 and Soyabean is around 67. Wheat is around 50 and Corn is approximately 45.
Common Protein Sources
Animal Sources :
Chicken – When chicken is considered it is important to note that such chicken is excluding feathers, heads, feet, beaks, nails, entrails etc. Biological Value of Chicken is 79. Eggs are also considered very good source of Proteins
Red Meat – When Red Meat is considered it is important to note that such meat is excluding horns, hooves, hair, hide, blood etc. Biological Value of Red Meat is approximately 74.
Chicken or Read Meat Meal : 'Meal' usually means grounded or reduced in particle size. Good Practice expects a Chicken meal has chicken parts excluding feathers, heads, feet, beaks, nails, entrails etc. The ingredient is then heat processed to remove water and fat. The end product is then ground to get a protein rich product.
Poultry or Meat By Products : 'By Products' usually mean ingredients unfit for human consumption are included eg. Chicken / Poultry By Products usually contain clean parts of chicken, feet, bones, head, entrails etc. Feathers are usually not included. Meat By Products may include bones, kidneys, heart, brain, liver, blood, lungs, spleen etc. Usually hooves, horns, hair, teeth etc are not included.
Other Sources :
Gluten : During processing of certain grains like wheat, barley, rye, oats etc the starchy carbohydrate is washed out and what remains is the rubbery protein residue. This residue is refereed to as Gluten. It is a crude mixture of Gliadin and Glutenin. Some dogs may be prone to Gluten allergy. Care should be taken while in such cases. Need to add something about merits/ de-mertis of gulten.
How much Protein ?
Protein requirement varies as factors like breed, age, activity level etc are to be considered. All other things being equal, a puppy will need more protein then an adult. A general guide to protein requirement is made available as under :
Stage
Suggested Protein % of food per sitting
Puppy
28% to 30%
Adult
17% to 20%
High Activity Dog
23% to 27%
Pregnant and or Lactating Dams
28% to 30%
Carbohydrates
To understand Carbohydrates role in a Dog's diet one needs to understand how the body utilizes carbohydrates.
Carbohydrates provide Energy. Carbohydrates are broken down into 3 parts i.e. Sugar (Glucose), Starch and Fibre.
It is Glucose that is needed by the body to maintain the health of vital organs like liver, heart, brain, thyroid, nerve tissue etc. The Central nervous system and the Brain needs adequate quantity of Glucose for optimum functioning. The brain dos not store glucose and is dependent on blood for the bare minimum supply. Correct amount of glucose production is essential for Thyroid functioning.
Gluconeogenesis is the process of converting Amino acids and Fat into Glucose.
The dog depends on Protein for its principle supply of amino acids (Refer to section on Protein). However if carbohydrates are present then the body will first convert carbohydrates into glucose instead of protein and fat as it is easier. In the absence of enough carbohydrates protein and fat are converted into glucose to fulfil the energy needs. Excess carbohydrates are stored in the liver and muscles as Glycogen and in the body as Fat.
The ancestral diet of dog largely consists of Protein. Carbohydrates played a minimal role in the dog's ancestral diet around 12% to 14%. As such dog's have evolved favouring Protein and Fats in their diet and do not expect or need large quantity of carbohydrates in their diet. However dogs can digest and utilize carbohydrates if present.
Sources of Carbohydrates
Rice
Corn
Wheat
Barley
Oats
Pulses
Potatoes
Sweet Potatoes
Fat
Fat is very essential ingredient in a dog's diet. Fat is necessary for optimum health of coat, skin, kidneys, heart and inflammation free joints. Fat is also a very important source of energy and give more energy then carbohydrates and proteins. Fat are preferred source of energy ahead of proteins and carbohydrates.
It is important to note that Fats do not affect dogs as they affect humans as far as cholesterol or heart diseases are concerned. Dogs do not have the tendency for cholesterol blocking the arteries.
Fat contributes to a dog's food taste, smell, structure etc. Fat also helps the body to absorb fat soluble vitamins like A, D, E & K.
The building blocks of Fat are Fatty Acids. A dog's body can make some fatty acids on its own however some fatty acids are needed to be included in the diet, these fatty acids are known as essential fatty acids. The essential fatty acids are divided into two groups as Omega 3 and Omega 6. A good diet for dogs should have both the groups of Fatty Acids in a specifically balanced ratio.
Sources of Omega 3 include Fish Oil, Flax Seed Oil, Canola Oil etc.
Sources of Omega 6 include Poultry Fat, Pork Fat, Sunflower Oils etc.
Since a dog's diet usually contains Omega 6 sources it is essential to add a good source of Omega 3.
Fish Oils have a form of Omega 3 called as DHA & EPA. Plant biased Oils have Alphalineoleic Acid (ALA), which needs to be converted in the body to be of use. Some dogs may not be able to convert the ALA due to deficiency of desaturase enzymes needed for the conversion.
Deficiency of sufficient quantity and or quality of Fat in diet may result in skin conditions like itching, dermatitis, dull coat etc. It is to be noted that substandard fat or rancid fat is not good for a dog as they may cause a deficiency of essential fatty acids resulting in poor coat or skin conditions mentioned above.
Vitamins
Vitamins are organic substances required in minute quantity by the body for many of the bodies metabolic processes..
Vitamins are divided into 2 groups Fat Soluble and Water Soluble.
Fat Soluble Vitamins
Fat soluble Vitamins are A, D, E & K. These Fat soluble vitamins are used by the body in the same way as Fat in diet. Excess amounts of the vitamins are stored in liver.
Water Soluble Vitamins
Water Soluble Vitamins are generally absorbed in the small intestine. Excess amounts are excreted through urine.
Following is a brief summary of some vitamins necessary for you dog.
Vitamin A
Necessary for: Good appetite, Good eyesight, helps in maintenance of skin and coat.
Deficiency: Skin problems, bone growth issues, decreased eyesight.
Sources: Liver, Chicken, Pork, Kidney, Brain, Carrots, Egg Yolks, Green leafy Vegetables.
Vitamin D
Necessary for: Assists the body is absorbing Calcium. Calcium is important for development and maintenance of healthy bones and teeth. Is important for blood clotting. Is needed to maintain sufficient blood level of calcium and phosphorus.
Deficiency: increased tendency of bones to fracture, abnormal bone formations.
Sources: Cheese, Yoghurt, Eggs, Cod Liver Oil, Liver, Kidney, If sufficient exposure to UV radiation is provided than Vitamin D can be manufactured by the body. Approximately 15 minutes of sunshine daily is sufficient for the body to produce the required quantity of vitamin D.
Vitamin E
Vitamin E is needed for normal reproduction and acts as an antioxidant. Vitamin E is also necessary for formation of red blood cells and helps the body to absorb vitamin K. The biologically active form that needs to be supplemented or present in the dog food is alpha-tocopherol or alpha-tocopherol acetate. There are other less optimum forms like gama-tocopherol or beta-tocopherol however alpha-tocopherol should be preferred wherever possible.
Deficiency: may lead to impairment of immune system, adversely affect reproductive system, degeneration of retina.
Sources: Spinach, green leafy vegetables, asparagus, vegetable oils, corn.
Vitamin K
Vitamin K is necessary for blood clotting. Usually the bacteria already present in a healthy intestine synthesize all the vitamin K needed by the body.
Deficiency: Only occurs if the body is unable to absorb Fats or Vitamins from the instestine.
Sources: Spinach, Green leafy vegetables, Cauliflower, Cabbage.
Water Soluble Vitamins
Vitamin B1
Vitamin B1 is needed for optimum functioning of Heart, muscles, nervous system. It is also mainly needed for conversion of carbohydrates into energy.
Deficiency: Causes nerve damage, seizures, weakness.
Sources: Liver, Peas, Rice, Whole grains, Meat.
Vitamin B2
Vitamin B2 is important for production of red blood cells, growth, maintenance of coat and skin, processing Fat, Carbohydrates & Protein. It also has a part in many enzyme reactions of the metabolism.
Deficiency: Usually causes weakness, anaemia, decreased reproductive performance.
Sources: Cheese, Yeast, Fist, Eggs, Organ meats, Liver.
Vitamin B3
Vitamin B is required for functioning of digestive system, nerves & skin.
Deficiency: Loss of appetite, bad breath, diarrhea, inflammation of the gums.
Sources: Liver, Meat, Poultry.
Vitamin B5
Vitamin B5 is required for synthesis of hormones and enzyme reactions in metabolism.
Deficiency: may result in diarrhea, hair loss.
Sources: Fish, Broccoli, Fish, Eggs, Cabbage, Sweet Potatoes.
Vitamin B6
Vitamin B6 is important for optimum health and functioning of the nervous system, supports the synthesis of antibodies by the immune system, is required for formation of red blood cells is necessary for protein metabolism.
Deficiency: may result in seizures and or anaemia.
Sources: Bananas, Eggs, Meat, Fish.
Vitamin B9
Vitamin B9 is necessary to synthesis new Proteins when needed. Vitamin B9 along with Vitamin B12 and Vitamin C is helps to digest Proteins. Vitamin B9 is useful for tissue growth and production of red blood cells.
Deficiency : may result in bone marrow disorders
Sources: Liver, Egg Yolk, Yeast, Melon, Carrots, Pumkins.
Vitamin C
Vitamin C is synthesized in the liver by dogs. Vitamin C is necessary for proper functioning of the immune system.
Deficiency: may adversely affect proper functioning of immune system and also result in improper or inadequate wound healing. Deficiency may also result in greater susceptibility to infections. Muscle and or Joint pains may also be a result of deficiency of Vitamin C.
Sources: Citrus Fruits, Cauliflower, Potatoes, Green Leafy Vegetables.