You might want to start the whole protocol over again, this time with a quality food -no wheat or corn. Something like Canidae or Wellness is good. I've never had success with EVO as it is too rich for my LGD's. Nothing from a grocery store or Sam's Club, but Costco has a pretty good food around $25/bag
The first step towards treatment is to NPO her for 24 hours. This means nothing given orally, food or water. You want her stomach to rest completelyShe can have some ice cubes to lick on, as they will provide fluids in extremely small amounts. After there has been no additional loose stools, start back on small amounts of water a few laps at a time, every 1-2 hours. If everything is OK over the next 6 hrs, gradually increase the volume in one sitting. After for 12 hrs, you can start back on small amounts of bland foods. These include cottage cheese, boiled rice, boiled chicken, lean browned ground turkey or hamburger with the fat washed off, oatmeal, scrambled egg, or prescription diets like I/D (pick up a bag from your vet). Start with 1-2 tablespoons every 2 hours. After 6 hrs, increase to volume and decrease the intervals. A good goal for a 100 lb animal is 1 cup every 4-6 hours. If food stays down the next 24 hrs, feed up to 2
cup in 3 meals over the next 2 days. If everything is still OK, you can start adding back regular food mixed into the bland foods. Keep the mix at no more than 50/50 for at least 2 more days, then gradually increase until regular food is at 100%. Do not give supplements or peanut butter until the dog is back to normal.
Once my dogs are back to 100%% regular food, I always add 1-2 T of pumpkin OR plain yogurt. I freeze dollops and just add to breakfast. Thankfully, I haven't had any episodes since my last foster Akbash came in 3 months ago.
Were you able to take a sample of the bloody stool to the vet? They should definitely have a sample if this is continuing after strictly following the protocol.