i have an 8 yr old miniature poodle. she has always been a very picky eater, but in the last few days she has stopped eating. I have tried all her favorites, (chicken, hamburger, cheese, hot dogs) and at most she takes a nibble. She has lost weight and her stool is soft, with bright red blood and smells very bad. She also has bad breath and I noticed her teeth in the very back of her mouth have tartar. I made an appointment with the vet for tomorrow morning, but I'm worried and would like to know what could be wrong with her and what I should expect tomorrow.