She was diagnosed with fluid buildup in the lungs about two months ago. I knew this was coming, and I've been spending extra time with her. Today, I could hear her breathing and she wasn't eating and couldn't sleep. Her entire body rocked with each breath. I took her in to the vet's and I knew it was going to be the last time. Her heart had given up even trying to compensate; it was beating slowly, and irregularly at that. There was nothing they could do.