Hi kms
Your plan sounds pretty good. Start by giving probiotics and digestive enzymes every meal, in fact, if you use a dog probiotic(Mercola’s is my favorite, but it is expensive) you can double the dose for the first few days. After you get the stools in order, you can cut back to a couple times a week. Up the pumpkin amount to 1 teaspoon for every 10 lbs. You only need to use it as needed. Some dogs need it with every transition, some never need it again except if they get into something that causes diarrhea.
Using commercial raw as a topper is fine, but if you are talking about keeping it to 20%, you can just add some human grade meat and here and there throw in a raw meaty bone like a rib or a turkey neck. You only need to worry about balance when you start to replace more of the meal than 20%.
