The Trained Alley Hounds in Ring 97 are bugged. They did not engage me, even though they were hostile as usual.
Attacking the Cobble Dogs gangmembers next to them did not make them attack me.
Even attacking one of the hounds from the group only made the one I attacked actually turn around and hit me.
The others were still passively standing around.
I confirmed this on two additional groups of Trained Alley Hounds afterwards.