Urgent -- vomiting, bloody diahhrea

I was just at the vet several times in the past week with my lab, Sashia for the exact same thing..I went into a panic mode when I saw the blood in her stool and of course was afraid she might becoming dehydrated with the vomiting..While I was there my vet mentioned that he has a chihuahua and that she has diahhrea with blood at least 6 times a year and that it was common in that breed of dog, the chihuahua..He said every time it happens he has to put his dog on anti-allergic canned dog food and it usually clears it up in time..He said dogs often even after years of using the same food become intolerant of certain foods..So now I have my lab on a different food to see if that helps..Please keep us updated on your dog's condition..We had x-rays taken , bllod panels done, everything you can think of and NOTHING showed up!..It turns out to be her food..The first 2 days we put her on the allergy canned food and then switched her back to a dry food for sensitive stomachs..He also told me with his dog that he usually gives his dog 2 tablespoons of yogurt before feeding her..Hope that helps..Jill