The flu can't keep Dr. Pol and the team away from helping the animals and people that depend on them most. While Dr. Pol is able to pinpoint what's making him ill, it's not so easy for his patients to do so. As he and Charles take on the complexities of cow ailments, Dr. Brenda goes to work on an abnormally lethargic dog and checks out a limping pet duck. Episode 10 season 2.