We switched her over gradually from Puppy Chow to Nature's Recipe. Now, she won't even eat the Nature's Recipe, so I had to go out and get Blue Large Breed Puppy. We started her gradual switch this morning, and she actually started eating the Nature's Recipe because it had the Blue brand in it.
We called the vet yesterday, and I asked if it was Parvo. He asked all these different questions about the symptoms, and she isn't vomiting and her gums aren't turning blue. She only has the diarrhea, it's like she is constipated or something because she strains when she tries to deficate.