Recently, I received a call from a new Wolfhound puppy owner who was seeking advice. During the conversation, the gentleman expressed his concern about protein levels in dog food. He informed me that he purchased a premium bag of dog food with a low protein level of 22%, as he was told that high levels of protein are not recommended for giant breed puppies as it can cause damage to their growing bones.

The topic of protein levels in giant breed puppy food is one that I have meant to discuss. First off, it is a myth that high protein levels cause damage to the long bones of a growing, giant breed puppy. Most people who feed commercially prepared dry dog food are misguided by this urban tale.

Instead, what should be one of the most pressing and harmful issues occupying people's minds about commercially prepared dog food designed for giant breed puppies is not protein BUT caloric density and the sources from which these calories are derived. As well as the high-density percentages of carbohydrates. In contrast, those who are entirely unperturbed about protein levels are those people who "Naturally Rear," as I do, where the protein sources are fresh, raw meat or poultry, fish, along with oats, yogurt, vegetables and so on.

Due to space limitations, I can only provide a review on this mainstream misconception as it could fill pages and pages. So, here goes.

Rapid growth stresses developing bones and joints. What can cause rapid growth is feeding a calorically dense and high carbohydrate diet which will make a pup grow too quickly; faster than their developing long bones and articulating joints can accommodate and will result in skeletal abnormalities.

Typically, as a pup evolves the bones and muscles should mature together in harmony, but bones that grow much too fast will be less dense and weaker than ones growing at a more appropriate rate. Weaker bones, in turn, creates issues for giant breeds who carry more weight in which such pup(s) will experience the causal factors of artificial nutrition.

What about protein? Protein is a source of energy. A point of fact is that growing puppies require more protein than an adult dog which contradicts the urban tale. Proteins are essential for building blocks of all tissues and organs, to include tendons, ligaments, cartilage, and muscle contraction. Yes, too much protein can be detrimental to healthy growth due to an imbalance of calcium and phosphorus which affects the long bones and joints. However, this is not always the culprit in commercially prepared puppy food. Why? Read on as down below I reveal some compelling relatively unknown information about the actual amounts of protein in such foods and their sources. What are the primary culprits in puppy as well adult dog food?

Most commercial dry dog foods contain at least 50% carbohydrates and sometimes more than 15% crude fiber. Let me quickly address crude fiber as this amount is at least three times the recommended amount according to the Mark Morris Institute who publishes the Small Animal Clinical Nutrition, 5th Edition on commercial pet foods. This book further reports that in excess, crude fiber reduces the energy and nutrients in the food whereas the dog has difficulty eating enough food to satisfy his nutritional needs. In other words, dogs consuming much of today's inferior, low digestibility commercial foods will devour large quantities of food, but the high amount of fiber within the diet can decrease mineral absorption. Thus, it does not matter how much the dog eats; he cannot absorb the necessary minerals because there is too much fiber.

Carbohydrates. Many commercial brand dog foods have high caloric density derived not just from fat but carbs. The principal function of carbohydrates is to provide structural integrity as they work as a binder holding the ground meal in shape. I already stated that most all dog foods are at least 50% carbohydrates, and it would be unusual for a dry pet food to be formulated with fewer than 40% carbohydrates because of the minimum requirement for extrusion or shaping through a die, as told by the Small Animal Clinical Nutrition, 5th Edition.

Incidentally, canines do not have the same enzymes as humans so they can only process carbohydrates very, very slowly. Importantly, the abundance of carbohydrates (sugars and starches) contained in commercial dog foods is a significant factor in canine dental disease and tartar build-up. Moreover, dental disease and heart disease can go hand in hand.

Here are some examples of carbohydrate concentrations commonly found in commercial dog food:
Rice Flour 90%
Rice 90%
Corn Flour 85%
Corn Starch 88%
Corn 81%
Grain Sorghum 80%
Wheat Flour 82%
Wheat 78%

Calories and fat. Both of these can present a bit of a dilemma for some companies. Typically, to dilute the number of calories in commercially prepared dog food, the manufacturer adds increased fiber, insoluble fiber such as cellulose and peanut hulls, to the processing. However, because crude fiber behaves as an anticaking agent, it simultaneously causes high friction during the extrusion or shaping process. So, the manufacturer has to add fat back into the ingredients so the mixture, commonly known as slurry, can be processed more efficiently. While adding fat back in sometimes can neutralize or minimize the fiber's primary purpose of reducing calories. According to Small Animal Clinical Nutrition, 5th Edition; "Fats contribute calories at 2.25 times the rate of carbohydrates or proteins, and the use of fat ingredients is the most efficient method of increasing the energy density of food to limit a pet’s consumption of other nutrients."

Back to the question of protein. There is an even lesser known truth about the actual amount of meat as listed on the dog food's label.

Again citing the Small Animal Nutrition 5th Edition, the United States has labeling regulations that stipulate ingredients must be listed in order of weight predominance. Of course, wet meat weighs more than dry meat, so, manufacturers use the wet weight of the meat or poultry that elevates or places the protein within the label's top three ingredients. They do so by incorporating fresh or frozen meat/poultry into the dry extruded dog food using a slurry composed of animal tissues, fat, and water, which is grounded and mixed in a separate tank. The water in the meat (60 to 70%), however, must first be dried off to make a dry product. Consequently, the actual amount of meat or poultry ingredients would be listed much farther down on the label if it were added as a dry meat meal.

Be aware that manufacturer claims that the "meat based" dog food has a high-meat content is not always accurate. Also, dog food ingredient labels list other sources that protein may also be derived from such as dried egg, rice gluten, corn gluten, and soybean meal.

The long and short of it is that densely packed carbohydrates in complete dog food along with high fats increase the caloric density, and this should be the worrisome factor that can cause health problems in growing giant breed puppies. All of this is not to say that an owner who feeds only meat and bone without other essential ingredients that provide nitrogen, minerals, calcium, phosphorus, and so on is doing the right thing. I utilize oats in my hound's diets along with all the other key components of "Natural Rearing" for a balance of nutrition. Nonetheless, I can assure you that my giant breed pups consume much higher amounts of protein than any bag of manufactured puppy food, but they do so in the fresh, raw variety. Never a slurry of animal tissues, fat, and water.