My dog is old she is 17 and she is a chihuahua. I started to give her purina canned food cause I noticed she was getting real thin. Before that she was on dry food. With the purina canned food it caused her to get diarrhea. So I switched to a special canned food that I have to buy at my vets. I have given her this food in the past but stopped cause she stopped eating it. Well she still doesn't eat it. So I started giving her cooked chicken mixed with rice. She only ate the chicken. I'm not sure if this made her diarrhea worse but it made it smell horrible. So I took her to the vet and he said do not feet her chicken or beef cause she is really old and her digestive system can't handle it. So he recommended yogurt with rice. She doesn't even touch it I don't want to force feed her and cause her to choke. She only weighs 4lbs. So I haven't seen her eat anything yesterday or today. So today I tried to feed her chicken again just so she could eat again, but now she doesn't even touch it. I'm so lost on what to do. Anybody have any ideas?