Ask a ques. abt my dog.

Question
At what age should i breed my labrador? She is black, should i breed it with white?

Answer
You do not breed labs until they have had all their final health clearances and have PASSED these health checks.  That is usually around 2 years of age.  

There is no such thing as a WHITE labrador.  They are yellow.

Please find a mentor to help you.  Unless you show and are involved in dog sports, you really should leave the breeding up to those who actually know what they are doing.