to YT!
All Yorkies seem to be different...some have perfectly straight hair, some a little wavey, some bordering curling....some people spend a lot of time with products and brushing to get the hair to lay flat...there are several products out there, if you search, that may help with that....as for breeding...hmmm....did you buy the pup for the sole purpose of breeding...or will you be happy just having an unconditionally loving baby in your life?
HERE is our section on Grooming (hair tips, etc)
and
HERE is our section on Breeding