Purebred, Crossbreed or Mongrel  
The Six Groups of Dogs  
The Advantages of a Purebred Dog  
Crossbreeds and Mongrels  
Male vs. Female  
Large and Small Dogs  
Long-Haired and Short-Haired Dogs  
Puppy or Older Dog  
Some Pointers on Picking the Individual Dog  

LARGE AND SMALL DOGS

Choosing between a large and small dog should be more than a matter of personal preference. More to the point: it's a matter of space, time and cost. The large dog needs plenty of space; medium-sized and small dogs can get along with less. A large dog will suffer, mentally and physically, from being penned up all day; therefore you will have to take time to exercise him. The smaller dog can get enough exercise running around the yard or house. To complete the space-time-cost trilogy; large dogs cost more to feed. The Saint Bernard, for instance, will eat over 5 pounds of food a day.