I believe the dog was sad. I had a 17 year old cat which belonged to my oldest daughter. They grew up together. We got precious when she was 3 and my daughter was 5, they did everything together. Everything!! When my daughter was ready to move out she didn't take precious, because she was old and use to the home she was in. I watch her lay in my daughters bed every day and slowly stopped eating. She was soon unable to walk. I picked her up put her in a bed I made up stairs and called my daughter and told her I didn't think precious had much time left with us. That was in the morning and precious laid in that bed I made from early morning til about 7pm breathing very shallow. When my daughter showed up she picked precious up and held her and cried. At that moment precious look up at my daughter and touched her nose with hers and made a big sigh and passed away. You could hear all her breath leave her body. She waited for my daughter to get there to say good bye. I was in utter shock. It was the sweetest saddest thing I ever witnessed. I believe animals have the same feelings we do in some since. I saw it with my own eyes.