If you have a female you want to breed, look for a suitable stud dog in good time. Remember that the first deciding factor should not be the number of championships a dog has won but the quality and the health of the offspring.  Of course it would be better to find a stud who is both a great Champion and a wonderful sire of winners and healthy puppies!  If the bitch has some fault (big ears, very light color, bad texture, shy personality...), these should be compensated for by selecting an appropriate stud.   Studying pedigrees can be helpful, but if you don't know a dog or a bloodline and its qualities, it is risky picking it simply on the basis of a champion title.  If possible, the two dogs may have several ancestors in common within the last two or three generation, this breeding will be called line-breeding, and this combinations have been known to "match" the best.  However, even if the two dogs do not have any ancestor in common, they can still produce excellent offspring.  This breeding will be called out-crossing (out-crossing different bloodlines). 

For those pet owners, even if you are not thinking to show any dog, or to produce show quality dogs, there is nothing wrong in owning stunning puppies, good representative of the breed and in producing very healthy dogs.  It has been reported that 70% of all Toy breeds carry hereditary problems or diseases, so be very careful in choosing the right stud for your little girl.  Don't be impulsive and don't choose a male just because it is cute and it is your sparkly neighbor's pet.  It is preferable and makes better sense to put some real thought into your canine project, especially since it is likely that you will have healthy and beautiful puppies and that they will share many happy/healthy years with you. 

 When to breed your bitch. The age of 18/19 months, or at least the second heat, is the right and earliest time you should breed your bitch.  Count from the first day you see blood in your bitch's vulva.  When the bleeding stops and the vulva begins to soften, usually at 11 or 12 days (but still it depends from bitch to bitch), the bitch is ready to be bred and she will accept the stud.