Okay sorry, I misread "basenji's mother" for mother's basenji.
Do you have your dog's registration number? If so, you can look up to see if the sire has been tested. If the dog is probable clear, your chances are good that your dog may never develop Fanconi. If the dog is a probable carrier or probable affected, then the chances are much worse.
The mother has only 2 genes to pass, both Fanconi.
If the sire is a probable carrier, then your chances for your dog to be affected are 50 percent and 50 percent chance probable carrier.
If the sire is affected, then your dog will be a probable affected. That does not mean 100 percent develop the disease.
Although the protocol calls for MONTHLY, not weekly testing, I can understand Lynn testing weekly with a probable affected. But at the very least, do monthly a couple of days in a row.