diahrea is a common sign.
My guys both received oral dewormer meds as a standard Banfield Vet procedure for their wellness plan.
This is not uncommon.
Caesar was always leash walked as a puppy and he still got it. Dont let your basenji eat grass or drink water off out of anything but your water bowl.
I have found that the vaccines for Giardia have never worked for either of my basenjis. It is typical for my guys. I didnt catch it at first because I thought Caesar's diahrea was from the training treats.
You are a great basenji mommy for bringing yours in for testing!