malinois schreef:yuri36 schreef:malinois schreef:
jij bent eigenwijs, net zoals het wolven verhaal kom jij nu maar eens met bewijs (in het NL graag)
Dat jij geen Engels kan lezen is mijn probleem niet. Helaas is niet alles in het Nederlands vertaald.
Ik vind jou eigenlijk veel eigenwijzer, als je geen Engels kan lezen en je ook niet wil laten informeren door mensen die wel Engels kunnen lezen.
Nederland is echt niet het middelpunt van de wereld hoor.
Ik kan prima engels lezen alleen woon ik nog steeds in NL en wil gewoon een NL onderzoek met foto's van inwendige honden en wolven en het zogenaamde verschil. (want dat is er niet in mijn ogen)
Nog een zeer juiste tekst over de mythe dat er meer voedingswaarde in barf/kvv ed zou zitten:
*Lees vooral wat ik rood en vetgemaakt heb. Uiteraard, de tekst is een open aanval op barf, maar waar het mij om gaat, is dat er veel kritiek op barf gegeven worden die de rauw-voerders in dit forum nu juist op het vegetarische dieet afvuren, en bovendien -zeer interessant- kun je in dit artikel lezen wat de wetenschap al lang weet, dat het voor het lichaam niet uitmaakt of bijvoorbeeld een bepaald aminozuur uit vlees of groente komt.
Nutrient Results of Feeding BARF. - Myth 6
"One of the most frustrating conditions in both dogs and cats fed raw foods, particularly the yeast, bone meal, muscle and gristle trim tissues and chicken parts such as necks or backs commonly used, is that of digestive disorders and the resulting deeper weaknesses, such as allergies, arthritis, I.B.S., liver, kidney or thyroid imbalance, poor immune responses and other organ issues, including diabetes and seizures."30 This comment from Dr. Lisa S. Newman, ND (Naturopathic Doctor), Ph.D., and Dr. Lee Veith, D.V.M. whom tried using BARF in the treatment of pets.
"All the [BARF] diets tested had nutritional deficiencies or excesses that could cause serious health problems when used in a long-term feeding program. Of equal concern is the health risks associated with bacteria in the raw food diets, especially the homemade diet that yielded E. coli O157:H7. Although owners feeding raw food diets often claim that dogs are more resistant to pathogenic bacteria, we are not aware of evidence to support that claim."31 This from Drs. Freeman and Michel in the work they published in March 2001 in the AVMA Journal.
Barfers' typically concentrate on ingredients and ignore nutrients. This is much akin to not being able to "see the forest because of the trees". Ingredients give the pet owner no clue in regards to an animal's prospective ability to utilize the nutrients the ingredient brings to the animal.
An individual pet does not take a molecule of chicken protein and use that molecule to replace damaged muscle tissue. It is the individual amino acids present within that molecule that the animal uses for biological functions. Barfers' often denigrate amino acids, vitamins, minerals and other nutrients derived from one source or another and proclaim some magical value to nutrients from another source. Any nutrient from a grain is presumed by most Barfers' to have lesser benefit than the same nutrient derived from a meat source. Multiple scientific studies have proven this to be a complete fallacy. There is no "traffic cop" in the stomach that refuses entry for some nutrient derived from grain and permits the passage of the same nutrient derived from a meat source. For example a molecule of tryptophan, an important amino acid, whether derived from soy, corn or beef has equal value to the animal. While some nutrients are in greater abundance in some ingredients, the biological value of the given nutrient is not negated simply because of the source.Barfers' frequently denigrate the value of grains in the diet of domestic dogs. The most commonly used grain in pet foods is corn. About 99% or the starch fraction of the grain is digested in dogs. This holds true of nearly all grains. The starch fraction of any grain contributes carbohydrates which are a source of rapidly available energy that does not require the kidneys to process it before it can be utilized. The protein fraction of corn, which is highly digestible in dogs, contributes valuable amino acid building blocks. Grains like corn also contribute high levels of naturally occurring Omega Fatty acids and the antioxidant lutein, critical for long term health. 100,000 years of genetic mutation and natural selection made it possible for domestic dogs to derive a significant amount of value out of grains.
In the process of proclaiming great value to the BARF diet, the proponents completely ignore one of the most common causes of death in domestic pets - renal (kidney) failure. In most cases the proposed diet recipes are excessive in calcium and phosphorous. While there is no data that shows the feeding of high levels of phosphorous will cause renal failure, there is a mountain of data which clearly shows renal failure can be greatly exacerbated by feeding such a diet. Most veterinary hospitals are unable to detect renal failure until 70% of the kidney is destroyed. Barfers' tend to concern themselves with internet fantasy diseases purported to be caused by artificial antioxidants and totally ignore real disease like renal failure. This is much like standing in the middle of an LA freeway with the cars whizzing by at 70 mph and being worried that you will die as a result of a lightning strike on a sunny California day. Ignoring real disease in favor of internet fantasy diseases is not the best choice for your pet.
Barfers' loudly proclaim the value of "raw" versus cooked. While there is no question that some nutrients are degraded by the cooking process there are also a number of nutrients that are unavailable to the animal unless the given ingredient is cooked. Sometimes there is a trade off. For example, vitamin C is easily destroyed by heat whereas carotenoids are made more available by the softening effects of cooking. Manufacturers can easily add in more vitamin C to increase the levels in the final product. In some cases vegetables must be cooked to be safe to eat. Common starches are a good example of a nutrient that is virtually unusable unless cooked. Cooking tomatoes significantly increases lycopene absorption. Uncooked whole grains are virtually useless to dogs. 18, 19 Digestibility as measured by protein efficiency ratio of raw kidney beans significantly improved when cooked. True digestibility and net protein utilization also showed a significant improvement in the case of cooked kidney beans.32 Trypsin inhibitors isolated from buckwheat seeds are heat stable and can cause poor digestion if they are not suitably cooked before consumption.34
Vitamins were first discovered well over a hundred years ago. The last vitamin discovered was vitamin k in 1946. The rate at which vitamins degrade during any given cooking process is well known and established. Tables of nutrient degradation under various types of cooking, at various temperatures, and various lengths of time have been well known for many years. Commercial pet food producers are well aware of these effects. It is very simple and inexpensive for any commercial manufacturer to add these nutrients into the product mix at a rate high enough to allow for degradation and still contain the needed quantities. In contrast the Barfer has no clue about the digestibility and availability of specific nutrients in the meals they prepare. No controlled feeding trials have been performed, and no testing of micro nutrient levels has been performed for any of the commonly promoted recipes, much less individual alterations to recipes proffered by the Barf crowd
Barfers' sometimes proclaim that there are "trace" nutrients we are not yet even aware of that are present in raw foods and not present in cooked foods. While the progress of science in determining what trace molecules exist in any given ingredient is increasing at a geometric rate there is no question that we may have some left to discover. What the Barfer fails to recognize is that 100,000 years of natural selection have created a domestic pet that is attuned to the effects of cooking and eating human trash. Further there may be just as many "trace" nutrients discovered to exist only in cooked versions of any given ingredient. We already know that many nutrients are not bio-available to the domestic dog unless they are cooked. Certainly we will discover new trace elements in food and how they impact the animal in the future. We will just as certainly discover trace nutrients in cooked foods that are not biologically available in raw foods. Failing to recognize the impact of 100,000 years of natural selection evolution and mutation on the domestic dog can lead to erroneous assumptions.Because Barf proponents ignore nutrients in favor of ingredients, all such diets end up unbalanced. Perhaps this is why the vast majority of veterinarians oppose Barf feeding, and why not even a single board certified veterinary nutritionist is a proponent of barf feeding. Very few, if any, Barfers' have the technical skills or the equipment necessary to analyze the meals they develop and administer to their pets. An analysis of any Barf diet recipe illustrates the problems this can entail. A commonly recommended Barf recipe provides the animal with 50% more calcium than is appropriate and 22% more phosphorous than an animal should have. Such excessive levels may lead to a number of long-term health problems. It is not uncommon for veterinarians to encounter puppies like Julie, a young puppy whose owner was determined to feed the BARF diet. After a few months the puppy developed osteoporosis and had several fractures, indicative of rickets. Placing the puppy back on a commercial diet resolved the problems an unbalanced diet created. Veterinary clinic observations of mal-nutrition among Barf diet feeders are hugely more frequent than is appropriate for the small percentage of people experimenting with this latest fad in pet food. If this same percentage of failures was found in any current drug or commercial food, it would be the subject of massive media investigations, TV News Show exposes, and the company involved would be spending the rest of its' life defending the lawsuits.