Just to be as sure as we can to eliminate the possibility of the barking noise potentially being created through a feedback loop as I think @angus.black also thought of checking for here:
I know you are saying here that you heard the barking noise from the camera itself here.
Just to try and further eliminate feedback noise as some degree of a possibility here, it might help us with that if we can ask you also:
Did your phone happen to be very near the WyzeCam and in an unlocked state?
If The answer is yes, it might help us more if you can remember if the Wyze app was actively running in the foreground?
If no, then it seems that a feedback loop was Not created between the phone and the camera (when this happens all kinds of crazy strange noises can occur… I have never had that happen with a WyzeCam though personally)