Peter treats a ewe that is struggling to give birth to twin lambs, and also performs a complicated and risky surgery on a tawny owl to remove the bird's ruptured eyeball. Julian examines a herd of cows from a breed that is on the endangered species list, a young alpaca has been unable to stand or walk since birth, and a dog lover is left distraught when one of his four-legged friends brutally attacks another.