Still, you could start a self-referral by initiating at a longer-distance hospital to differentiate heart disease, primary lung disease, mass effect, or infectious disease causing her pleural effusion. Especially now that she is stable and the longer car transport less likely to stress her respiration. Her current breathing rate and appetite are so improved, that is when we prefer to do an ultrasound, when our babies aren't as stressed or symptomatic. Chest and abdominal ultrasound, with them reviewing your primary care vet's radiographs and labwork, can get her on additional effective treatment for the primary disease causing the accumulation of fluid in her chest cavity. So very glad your reindeer huntress is better!