There's something seriously wrong with my dog! She isn't eating or drinking, she's breathing hard, she can't walk without wobbling, it's awful! She was doing just fine yesterday! We were trekking across a river with her! I'm worried. She's a pretty old dog, about 12 I'd say. I don't want her to die. She's been with me since I was born. She can't just die on me. Not like my other dog.