
We have the Breed Record Supplements for the Working group so I've looked for litters for that date in the Autumn and Winter 2014 editions. No luck I'm afraid. I even looked in the Spring 2015 copy and there isn't a litter for that date in there either.
Dogues have been very popular in recent years and I know there's a huge number of unregistered puppies out there. So I'm guessing you will never know about her pedigree.
Well done for rescuing her, I hope she keeps you company for a good few more years.