@dedes9-While this could be from a bully stick but I have never had that issue... You didn't say what age she is? Is she still teething? But in the end, I would seek a Vet visit as soon as possible.
@dedes9 - Sounds like it could be an issue with the patella. I would suggest a Vet visit to have them check that out. Here is a link you can read about it. While it is not a big issue with Basenjis it does show up... https://www.ofa.org/diseases/other-diseases/patellar-luxation
