Tom is golfing, but the ball keeps jumping out of the cup, thanks to Jerry. Tom puts Jerry to work as a tee, but Jerry keeps doing things like replacing Tom's ball with a bird's egg that hatches in flight, or tying his club to his tail.

Tom's playing tennis, and Jerry is carrying his equipment for him. However, Tom's opponent, a cigar-smoking cat, is much better than Tom and is soon (literally) beating him soundly. Jerry comes to the rescue with a special "killer" tennis ball. But before long, everyone seems to be playing against everyone else.

When a duck hatches from the egg underneath Tom, he is convinced he is his mother. Tom thinks that he would like to eat the newborn duck, but Jerry shows him the truth while saving him from being eaten.

Spike explains to his son the rules of being a dog: 1: be man's best friend (begging, lying at feet); 2: bury bones; 3: chase cats. Just then, Tom (and Jerry) run by, offering the perfect practice subject. Spike lectures Tom to be scared by the pup or else; Jerry overhears, and is soon doing his best dog impersonation, while Tom works ...