THE GRATEFUL POODLE - Mark Twain 

One day a benevolent physician (who had read the books) having found a stray poodle suffering from a broken leg, conveyed the poor creature to his home, and after setting and bandaging the injured limb gave the little outcast its liberty again, and thought no more about the matter. But how great was his surprise, upon opening his door one morning, some days later, to find the grateful poodle patiently waiting there, and in its company another stray dog, one of whose legs, by some accident, had been broken. The kind physician at once relieved the distressed animal, nor did he forget to admire the inscrutable goodness and mercy of God, who had been willing to use so humble an instrument as the poor outcast poodle for the inculcating of, etc., etc., etc.