B and C vitamins are water soluable, which means whatever the body does not use are eliminated in the urine. You basically cannot "overdo" the vitamins except too much can cause loose bowels (that's why you often see it recommended to supplement iwth Vitamin C "to bowel tolerance"). Vitamins A, D, E and K are fat soluable and it IS possible to cause problems by oversupplementing - sometimes the problems can be as bad if not worse than UNDER supplementation. According to Kymythy Schultze in her book, "The Ultimate Diet", she states:

"Alfalfa contains vitamins A, B1, B6, B12, C, D, E, K and U, plus beta-carotene, niacin, pantothenic acid, biotin, folic acid, calcium, phosphorus, potassium, magnesium, iron, zinc, copper, protein, amino acids, trace elements and fiber. It reduces tissue damage from radiotherapy, helps bleeding disorders, has antibacterial action against salmonella and has a protein with known anti-tumor activity. It's used as a general tonic, to detoxify the body and to treat colon disorders, hemorrhages, diabetes, ulcers and arthritis. Use the alfalfa leaf and stem in powdered or liquid form. Do not use alfalfa seeds as they contain a natural toxin.

Kelp contains vitamins A, B1, B3, B5, B6, B9, B12, C and E, plus zinc, viotin, bromine, calcium, choline, copper, inositol, iodine, PABA, potassium, selenium, sodium and sulfur. It's iodine content is very good for glands and organs, especially the thyroid and liver. It can bind with chemical pollutants in the gastrointestinal tract and prevent their absorption by the body. It increases the contractile force of the heart, improves circulation and is often used for hair loss, goiter, ulcers, obesity and mineral deficiency. Equal parts of alfalfa and kelp in your dog's or cat's food provides a vast array of health-enhancing nutrients as a complete vitamin and mineral supplement.

Other green foods you may use include algae (chlorella, spirulina, blue-green), aloe vera, grasses and sea greens. Since these are plants, they should be fed to carnivores in fairly small amounts, proportionately."

Raw meat, fish and eggs provide an array of amino acids/protein, enzymes, antioxidants, Vitamins A, C, D, E, K, B1, B2, B3, B5, B6, B12, biotin, choline, folic acid, inositol, iodine, pantothenic acid, paba, fatty acids, caldium, phosphorus, magnesium, iron, potassium, chromium, copper, manganese, selenium, sodium, sulfur, vanadium, zinc and CoQ10 (see pg 26 of "The Ultimate Diet").

Raw veggies provide enzymes, antioxidants, betacarotene, carbohydrates, fiber, phytochemicals, Vitamins A, B1, B2, B3, B5, B6, C, D, E, K, boron, choline, folic acid, inositol, iodine, paba, pantothenic acid, calcium, chromium, copper, iron, iodine, magnesium, manganese, molybdenum, phosphorus, potassium, silicon, sodium, sulfur and selenium.

I haven't cut supplements out totally, although IMO a lot of people tend to over-supplement. This was something Billinghurst suggested too at a recent seminar here, and he mentioned that he only supplements his own dogs every now and again.

I think if you are providing a good varied diet you will be providing pretty much what your dog needs - all in a highly bio-available form. My first preference whenlooking to a certain vitamin/mineral will always be to provide it in its natural form first. So if I feel I need to provide more Vitamin B for example, I would consider what foods contain that vitamin first (e.g. liver) rather than reaching for an artificial supplement.

That said, I certainly see a benefit in supplementing those things that our dogs may be missing in the translation from a 'wild' diet to its 'moder' equivalent (i.e. BARF). As we don't necessarily feed the whole animal (eyes, brains, stomach and intestines, etc.) for the addition of things like EFAs (e.g. flaxseed oil) on occasion can be useful. I would include yogurt in this category too - it contains good bacteria which a dog may otherwise have gotten from eating stomach contents/intestines, etc (but green tripe can help here too).

I like to add a bit of kelp every now and again for its trace elements. Modern soils have been depleted by overcropping, etc. and Australian soils in particular are low in iodine. Kelp adds back these trace elements into the diet.

I add Vitamins C and E every now and then for their antioxidant properties and their value to optimize health - particularly in our modern polluted environment. vitamin C is particularly good in times of stress and I am more likely to include it then than at other times.

In Pat Lazarus book, "Keep Your Dog Healthy the Natural Way," under the topic of food combining he states:

"How you combine food groups can be crucial to your dog's health. Why? The digestive organs secret enzymes to break down food so it can be properly used by the body. When carbohydrates and proteins are eaten at the same time, the protein enzymes go to work first, and the digestion of carbohydrates must wait. While the ??? are waiting around to be digested, they ferment and release toxins in the body.

Proper food combining might more aptly be called not combining foods: Give only meat (or other heavy proteins such as eggs or milk) at one meal; give carbohydrates (fruit and grains) for the other meal. Vegetables, though may be given with either grains or heavy proteins."

He goes on to mention this can also help in preventing pancreatitus.

No, there is absolutely no reason to be concerned. Raw food is full of naturally occurring water! All the moisture needed to digest raw food is contained in raw food!