My dog is 10 years old and two years ago was diagnosed with cushing. She now sleeps all day and almost all night. She won't go for walks or play with her toys. She has started vomiting, usually about 5 hours after eating. Some times she won't eat in the morning at all. But she will drink water. She has often pee in the house and one or twice pooped in the house. She is also being very possive of me and follows me to each room in the house. When she is sitting on the floor she hangs her head sometimes. Is it time to put her down.