Q. I recently changed my small dogs food to IAMS. Since then he has trouble eating and vomits/diahrrea frequently with blood in the stool. Is this flu?
A. I would not suggest switching to IAMS I would rather you switch to a more high quality food such as Blue Buffalo Into the Wilderness, Merrik, Natural Balance, or Wellness. You must do a slow transition between a week, start with 10% new 90% old until the end of the week you have 100% new 0% old. The vomiting/diarrhea may not be related, it would be best to consult your dog's regular veterinarian. Normally you will not see blood in the stool from diet change.