@BasenjiByTheBay:
But at that point if they do not intend to breed what diference does it make? Sadly, the new pup may be likely to eventually have Fanconi. If it's a BYB or a rescue, what can they do about it at that point? There's no one to give it back to - even if they haven't already fallen in love and don't want to give up their baby. Yeah, at some point, it's probably a good idea to know what's coming. But when you're in the first stage of doggie-love, knowing that maybe they'll die at some point…it's kind of a buzz kill. And you can't change it, so why create that anxiety right now?
You can't change it, but you do increase the odds that your dog will have less kidney damage and a better quality of life if you are informed. You do the test, not because you are going to give up your dog, that is the attitude that is keeping BRAT from testing and allowing people an informed decision, you do the test so you know because that knowledge can make world of difference for your dog.
Maybe my attitude is so different about health issues because I volunteer at my shelter, I have done dog evaluations for BRAT, and I have friends who have left the veterinary profession because they just couldn't deal emotionally with the results of putting off today because it would have been a buzz kill. The results of that attitude can be truly devastating. I placed a dog who had a reduced lifespan because the owners wouldn't admit that the dog had Fanconi and then wanted to give her up because she had chronic bladder infections as was peeing everywhere. My shelter had to put to sleep over 100 dogs in the month of May and close for 3 weeks because of distemper outbreak because owners in my county don't vaccinate.
The thing with the Fanconi Marker Test, is that it isn't a buzz kill, doing the test means you can relieve much of the monthly anxiety when you do urine testing. Obviously, if the dog has tested Probably Affected, there will always be breath holding, is this the time they test positive? But even then at least the owners have had time to become well acquainted with what will need to be done, will have had time to find out where the resources they are going to need are, instead of the frantic, panic that occurs when it hits unexpectedly.