Peter receives an emergency call from his old friend Ivor, who has found one of his calves limping, and Peter suspects her leg is broken. Julian is slightly overwhelmed when 18 rats are brought to the practice, while Matt visits a blind sheep whose eye has become dangerously enlarged and David deals with a stray dog that's been brought into the animal hospital.

Kaiser the alpaca has a mysterious and painful skin problem, and Matt calls for Julian to help him work out what is causing it, while Shona feels the pressure when she visits a herd of pedigree cows to fix a hernia in a calf for the first time. Peter tends a donkey that has has a nasty-looking cut on his eyelid, and Julian is anxious when he tries to clip the claws and beak of an aggressive parrot.