This is absolutely the only way to handle gastrointestinal issues with dogs in my opinion. I have a young lab with whom I have used this protocol, and the results are almost instantaneous. I lapsed with the probiotics and she had a bout of vomiting and gurgling stomach. I immediately gave her a digestive enzyme and 1/4 tsp. of a probiotic for animals and two cold-pressed barley tablets in a little warm water, and her stomach settled immediately. You have to watch the barley caps, monitoring the dog's urine from time to time to make sure you don't cause calcium oxylate crystals because of an overly alkaline diet, but since I am feeding a high end bison diet, this isn't a concern at this time.
If you feed your dog raw fruits (apples, pears) only do so when there is nothing in her stomach and well before the next meal. NEVER feed fruit with anything else.
I try to feed raw carrots and romaine as treats between meals too, but it has to be well after the dog has digested the cooked dry food.
I have heard that the best time to feed a dog is between noon and 4 pm, since this is when their digestive tract is most prepared to process food. Since I feed twice per day, the second one is always between these hours, closer to noon than 4.