Hello. I am very sorry to hear about Ginger's diagnosis, but you have come to a good place where you will find bucketloads of support, advice and information from people who understand and empathise.
Are you ready for some reading? Sorry, but this is the best way to bring you up-to-date with information - some of which will certainly help you and Ginger, I'm sure of it. BUN refers to blood urea nitrogen and is a major indication of the toxin build-up, but creatinine is the more important blood result. You have certainly done the right thing in adopting a KD specific diet straight away, and this should have some positive influence on her blood levels over a short time.
Now to the reading ...
There's a document that tries it's best to explain all the bloodwork more easily than some rather scientific articles online. You only need concentrate on the things like BUN, Creatinine and Phosphorus, for now. You can find my article on that (really more of a list with explanations) here:
http://www.medhelp.org/health_pages/Pets/Canine-Blood-Chemistry-Results-Reference-Guide/show/1296?cid=3
The next articles are again written by me and all have relevance, the first one being the most important right now:
http://www.infobarrel.com/How_Diet_Affects_Dogs_with_Chronic_Kidney_Disease
http://www.infobarrel.com/Calcitriol_Therapy_For_Dogs_With_Kidney_Disease
http://www.infobarrel.com/Supplements_Useful_For_Kidney_Failure_Dogs
http://www.infobarrel.com/Why_Dry_Dog_Food_Is_Bad_For_Dogs
http://www.infobarrel.com/Everyday_Foods_That_Are_Poisonous_To_Dogs
The last two in the list above are just to be sure you aren't feeding things you shouldn't be feeding, even as treats.
Once you have read through these documents, please ask any questions you may have. It is virtually impossible to say what you can expect in terms of quality and longevity of life at this very early stage. This largely depends on how far the kidney disease has progressed, how resilient Ginger is and how well she reacts to diet and other interventions. For now, it is best to take things one day at a time.
I hope you find joining our Group (I call it a 'family' of friends) proves helpful.
Tony