Yes they sure can. My daughter went to Vegas and her dog stayed with us. Bella had lots of bloody diarrhea all weekend and we took her to the vet. We had many tests done and the vet said that she has seen many of the small breeds that will get stressed and have bouts of it. It costs about $600 for all the tests with negative results. The vet boards dogs sometimes and said that some will have the diarrhea until the owner comes back to pick them up. |