Originally Posted by labman
Please don't! You don't give your location, and the 3.1 KG alerts me to perhaps you are not in the USA. We have a terrible problem here with people breeding excessive numbers of often low quality dogs. How much research have you done on her? It what ways is she outstanding with fine qualities worth passing on? Is she and the dogs in her pedigree free from common problems with Mini Dachshunds, allergies, back problems, etc.? I am afraid your selfish pleasure will only contribute to the general misery of the dog world.
If you insist on going ahead with this misadventure, at least wait a little longer. If she comes in season again in 6 months, she would be being bred at 14 months and delivering at 16 months, very much on the young side.