Sorry to be so late on commenting here. There are several Facebook groups you may want to join. 2 are Basenji specific.
Bladder Stones Basenji - https://www.facebook.com/groups/1505737939475808/
Canine Cystinuria - https://www.facebook.com/groups/1264949876904169/
The third group is secret and you need to be Facebook friends with a member in order to join. Contact me if you are interested in joining - Basenji Cystine Bladder Stone Awareness.