While a Dachshund or Chihuahua will be quite happy on a 100 acre estate, a Great Dane isn’t going to get on well in a small city apartment. You need to judge the “upper limit” of dog size before choosing which one you want. Also bear in mind that puppies from unknown ancestry might turn out to be bigger – or smaller – than you’d bargained for.
A Great Dane and a Chihuahua - can you believe these guys have the same doggie ancestor?
There are various classes of dog, categorized according to size - Toy, Small, Medium, Large, and Giant.
The next few pages of this guide deal with each of these in turn, to help you choose the dog whose size is perfect for you.