My mom has a 13 year old Russian blue, kiki. My mom is also stubborn and won't take her to the vet. The cat has been vomiting about once or twice a week, sometimes more, for a little over a year. Her diet was an indoor Purina food until 3 months ago when she was switched to a grain free food, not sure of the brand..I think it has a doctor's name in it. At about the same time kiki's diet was changed she still urinated in the litter box, but 3 or 4 times she has pooped right outside the litter box. The last few days, she has been pooping in a different room, always in the same general area. Her litter box is changed weekly and scooped daily. Are there any at home remedies? Does she need to see a vet? What are some things that could be causing this? Thank you so much!