How do you get fast money on nintendogs besides going on walks and entering shows?

To get a lot of cash in Nintendogs: Chihuahua and friends, you have two options. First, the best way is to do competitions. There are agility trails, obediance contests, and disc competitions. You get a money prize when you are in the top three. You can also get a lot of money by selling the prizes that your dog gives you when you go on walks.