How do you get lab on Nintendogs chiwahwa and friends?

First, get a girl and a boy dog of the same breed (best if the boy likes to sleep a lot, girl doesn't get into fights). You can only feed them dry food and milk. Also if you have them put the rose on the girl, and put the lucky collar on the boy. you can play with them. Don't take the girl to contests or on walks. The boy can go on walks but try not to take him to contests. Be patient this can take 4 to 14 days!