It is sink or swim as Dr. K tries to solve mobility issues for two goldfish. A severe macaw is brought in with a serious bite wound to the foot, caused by a bigger bird. A rabbit presents with a large amount of fluid in the abdomen and the exploratory surgery reveals a shocking result. Dr. K treats a tiny yellow-bellied slider that may have pneumonia, while Dr. Thielen treats a ferret with a large tumor on her tail.