Sorry, forgot about this thread but felt the need to reply. Dogs are not omnivores, they are carnivores. They are not "obligate" carnivores like cats, as I mentioned in my previous post they can eat other food items in order to survive such as in the event of food scarcity. They do not require fruits and vegetables as you stated. They lack the ability to process cellulose. For instance, try feeding raw carrots or any veggie or fruit and see how it looks when it is excreted. Exactly the same. This is why folks who do choose to feed fruits and veggies puree them - otherwise they pass through undigested. Proof enough for me that they are not a natural part of the diet. We humans have a tendency to want to believe that what is good for us is good for our pets, to their detriment. They absolutely do not require carbohydrates and giving fruits and vegetables on a regular basis is taxing on the system. I not only have done extensive research, but have been feeding this way for many, many years. Additionally, I would suggest that your berner has underlying issues that are causing him to have digestive issues. In twenty years I have never seen a dog that could not be transitioned to raw. It can take some time especially with an older dog with a weak digestive tract (from never having to function normally). A dog that has been eating nothing but kibble (even grain-free) all his life will have an impaired digestive system and therefore an impaired immune system. Add all the unnecessary toxins like vaccines and pesticides and it is compounded. One of the first signs of toxic overload is skin issues such as red,itchy skin, yeast infections, odor,etc.