There are several alternatives to metronidazole, but how your dog is treated will depend on their diagnosis. For example, diphenoxylate is another common diarrhea medication for dogs that treats sudden-onset diarrhea and can be used in long-term treatment for dogs with irritable bowel. In addition, DiaGel is another anti-diarrhea medication for dogs that experience diarrhea due to bacterial infections or stress and can help prevent diarrhea as a side effect of medication. In addition, vets may choose to let mild diarrhea subside on its own, while others may recommend natural remedies like canned pumpkin to give your dog an additional boost of fiber to bulk up their stool or probiotics to support gut health and prevent diarrhea. Of course, you should never treat your pet’s diarrhea at home without consulting with your vet, especially if you’re unsure of the cause of their diarrhea. Because there are many possible causes, ranging from parasites to infection and even introducing a new food into your dog’s diet, it’s always best to have them diagnosed by a vet to rule out any serious illnesses or treat them.