Dog has been refusing dry dog food, and has become thin, ate boiled rice with meat for maybe 3 days, refuses that now gave chicken broth which she drank, but only ate a little of plain yogurt. Her manner has been upbeat, as always- I began to get more worried on Thursday, Feb 11, called vet Fri, and they are out of office until Feb 22. I have given beef bones, in the past. Could she have an obstruction? Stool is darker and smaller than usual