Sorry for the delayed response.
I wasn't informed you can report parvo as mentioned above but I'll be doing that now. We did contact the better business bureau, but the situation is a bit complicated and wasn't worth the effort of going 12 hours away to court, returning the pup, or anything. I'll just describe my experience with the breeder.
We began contact in December 2015 after I had a fall through with a local breeder (one pup was stillborn, so they returned my deposit I sent in September.) I asked if she had any litters planned still, and she claimed she'd have pups ready to go around the 22nd of February.
We contacted back and forth and I sent her a deposit for the puppy I was interested in. This was the third week of January. I don't know why it didn't occur to me to ask for the dogs specific birth date, but I was informed that she typically sends pups home from 8-9 weeks after they've received vaccinations. I planned on picking my dog up February 26th or the 19th. I assumed he'd be nearly 9 or 10 weeks old. Due to a snowstorm around the 19th I asked when I should come. She suggested the weekend of the 14th and I thought the dog would be a bit young but went with it. As I was about to leave she called & claimed he had a bad reaction to his vaccines & was sick. I told her that it's fine I'd rather wait to be safe. I ended up going the 19th and picking him up. When I received his vaccination records I realized he wasn't born until January 5th and wasn't vaccinated until February 16th. So the whole him having a bad reaction thing was another lie. As for his AKC registration, his sire and dam are listed. Yet when looked up on the basenji pedigree directory, his AKC mother is the daughter of the dog listed as his AKC father. I was told that he'd be sleepy and not willing to eat or drink much for a few days because that's normal. On the sixth day of him acting odd we took him to the vet where he got the positive parvo test.
There are so many issues that I'm really unsure if Nocturnal Kennels was a bad breeder or if there were just some minor issues, as no breeder is going to be completely perfect. I should've asked his specific age, the dam and sire could be a simple error of technology, and he could've picked up the parvo from a rest stop on the way home.
Our vet contacted Sarah to follow through with the contract we signed but to receive the amount we paid for him (only 1/3 the vet bill anyhow) we would have to send him back to her. There are so many issues as to whether it could be a false positive and the lying about vaccinations, false advertisement about the "family" life the dogs at the kennels have, etc... That it's not really worth pursuing anything. Truthfully I was shocked and felt guilty for purchasing a pup from them.
Like I said, there are many issues that could easily be dismissed, so I do not at all want to bash them, but they're definitely not somewhere I'll get my next basenji from. It was all a very shady experience.
I am glad that I do have Kaseko now, the treatment and everything we've gone through was worth it. Our vet has put us on a payment plan so it's manageable.
As for the lasting effects of parvo, I wasn't aware that there were long term issues associated with it. We cleaned thoroughly and even took our 3 elderly rescue pugs to the vet (they're up to date on vaccines and were not around the puppy due to one being blind and one deaf) just to make sure. It was just one big fiasco.
I'll be sending a report to the address mentioned above about the parvo. But otherwise there's not much else that can be done. I've definitely learned my lesson. Thank you all for the help. I don't want any issues or something of the like, I'm just glad Kaseko is doing well and no other dogs got sick.