Harry, a mild-mannered man, brings home a shaggy dog he has named Robert. Harry's wife, Alice, disapproves because they already have a dog named Chang, a tiny Pekinese Thoroughbred. Harry tries to prove to Alice that Robert, the dog he brought home, is also some sort or Thoroughbred. But all Robert seems to do is make a nuisance of himself as he goofily practices all the abilities of various breeds.