I have a 10 yrs old female sheltie, she is 15 lbs, always has been very consistent weight. She has always been a fussy eater, and I only feed her dry dog food for small breeds, the same food. Since Sunday she hasn't been eating, drinking a little water. She seems rather lathegic, not herself at all. She has been going for her daily walks, she usually urinates fine along the way and poops once, yesterday she didn't poop, but she was still urinating. Today she seems worse and she had a bowel movement but it was very loose, which hers are never like that. Can you help me? I have lost my job, and really can't afford to bring her to the vet, but if this is serious I may have to find a way, what do you think?