My dog is 17 years old. I noticed about a week ago she was getting really thin so I changed her from dry dog food to canned food (purina). I noticed about 2-3 days later she had watery stools so I decided to switch back to an old canned food that I knew she was ok eating that I purchased from the vet (I stopped using this food in the past because she didn't like it anymore). Now she doesn't even eat this food and she barley drinks any water. She's old she can barely see and she can't hear. She had x-rays less than a year ago and it showed that she had a enlarged heart and something wrong with her spine, but everything else was fine. Why isn't she eating? is ok to just start feeding her ground beef, chicken and rice forever (that I have to cook)? I'm afraid to take her to the vet cause I'm afraid they'll tell me to put her to sleep. Earlier today we fed her a hamburger patty and she ate it all. If this is ok to do how much should I feed her of this a day? Also, if I don't see her drinking enough water is it ok to start using a syringe?