I think it's wonderful that you obviously love your dog so much. It appears you have done an amazing job with her and want what's best for her.
When it comes to breeding, there should be a lot of thought that goes in to it. Not just is she too old and do we have time. Since your girl will be bringing life into the world at your behest, it is super important that you make sure she is healthy before any breeding. Please understand that not all whelpings go easily. A Csection may be needed. Which is full anesthesia and all associated risks, including death of your wonderful dog. Is it worth her life?
But more than that, if she has a litter of 8 pups, it's your responsibility to the potential owners of those new pups, that they have the genetics to be a healthy dog for a long time.
To ensure this, both your girl and the potential sire should be cleared by the OFA or PennHIP as free from hip dysplasia and elbow dysplasia. They should also both be free of Degenerative Myelopathy. All of which could make one their puppies have a devastatingly painful life.
Temperament is also very important, the GSD is first and foremost a working dog, so to preserve the integrity of the breed, both parents should have at least some kind of working title. I understand that you are probably breeding for pets only. But those titles show that the dogs have stable temperaments and clear heads. And THAT'S what you want to pass on to new owners.
You are going to get some VERY strong opinions on this subject, and many will not be "friendly". As a board full of die hard GSD enthusiasts, there are lots of strong opinions on breeding dogs that don't conform to standard in health, temperament and drive.
I wish you luck, I don't recommend you breed her. Honestly.
If you love her and her lines, and have a good relationship with her breeder, then maybe just consider getting a puppy from the same lines.
Sent from Petguide.com Free App