It's business as usual at Dr. K's exotic animal E.R., until a stressed out Eurasian lynx is brought in for over-grooming and not eating. Dr. K suspects a large hairball to be at the root of the problem, and contemplates emergency surgery on the large cat. Dr. Thielen sees two emergency cases of her own, including a ball python that was brutally attacked by a feeder rat, and a rescued cockatiel that is in distress, trying to lay an egg. A lame baby chicken gets a new lease on life, while a recently neutered pot-bellied pig continues to heal and hopefully get rid of his "boy juices" smell.

Dr. K and her team are preparing for surgery on Bob the sulcata tortoise, who was brought in with a mass on his neck, likely a puncture wound caused by humping a stack of wood. At the same time, an emergency case is rushed into the treatment room. Shelby, a 9-year-old chinchilla, is bleeding from the mouth and the cause is unknown. Dr. K rushes to solve the case before the fragile animal loses too much blood. Meanwhile, Dr. Thielen takes on a mystery case involving a therapy chicken with a lame leg. The diagnosis leaves the owner faced with a heart-wrenching decision, while Mimi the pot-bellied pig is put to the weight loss test after being put on a diet.