Put the author's conclusion into your own words.

i dont know the answer

but I think its this text

17. The matter of physical conditioning is important. A man whose carriage is faulty and who slouches and droops his tail is a reflection on the dog who owns him. The best way to keep him in shape is to work him constantly, and never give him a chance to relax. Racing him up and down the street at the end of a leash, for example, is a great conditioner.

18. If he attempts to slump into an easy chair when he gets back, the dog should leap into it ahead of him and force him to sit in a straight-backed chair to improve his posture.

19. Be sure to get him up three or four times during the night and make him go out for a walk, particularly if it is raining.

20. Equally important is diet. The average man has a tendency to gobble everything in sight, and the dog should exercise a restraining influence on his appetite by eating all the leftovers in the house before the man gets a chance at them.

21. Last but not least, it is up to the dog to see that his man has the right companions. If he does not approve of a guest who has been invited to the house for dinner, he should express his dislike by removing a small section of the visitor's trouser leg as a gentle hint. Personally, I look forward to seeing the milkman these days, because he is practically the only person my dog will let in the house.

22. Not every dog who tries to bring up a man is as successful as my setter. The answer lies in understanding. The dog must be patient, and not work himself into a tantrum if his man cannot learn to chase rabbits or wriggle under fences as well as the dog does. After all, as my setter says, "It's hard to teach an old man new tricks."