So my sister brought her chihuahua puppy home on Sunday. She had a little bit of diarrhea yesterday morning. She had a solid stool this morning. Then, she had a jelly poop with blood in it a few minutes ago. She came with ProPlan but refused to eat it, so my sister put her straight onto raw (Nature's Variety chicken). She's still active and running around. No vomiting. I think it's from stress and the food switch. Thoughts?