Get two separate fecal tests done, one for Giardia and one for Clostridium Difficile.
Then do a test panel for food intolerances and allergies. I used Glacier Peak Holistics (saved my dogs’ lives).
While you wait for these results, (fast him for 8 hrs) then feed your dog a formula from Zignature dog food, #1 for sensitive tummies. Worry about your large breed needs after you know what ingredients to which he’s intolerant.
Dogs go into dehydration mode immediately after the first bout of diarrhea, so if it’s been on going, he may need a fluid IV treatment at the vet. Diarrhea is not normal, so when it occurs, you need to backtrack on everything your pup consumed.
