For his 14th birthday, Felix wants a rifle, but receives a telescope instead. He borrows his fathers rifle to go hunting, on another one of his 'get rich quick schemes', to provide venison for the White Sands Hotel. Gus hears the shot, and finds Felix bending over a wounded Digger. Arthur Pettibone, is a veterinarian student, the oldest son of Clive, who his eye on Felicity. He treats Digger, knowing he is making an impression. Gus is not pleased at Felicity's reaction to Arthur, and realizes that he has competition for her affections. (thetvdb.com)