LP, I tend to agree with your thoughts on this. I know that when Shady(ACD) first started going to shows with a friend's sheltie she seemed fascinated, taking to shoving her nose right into their coats to check them out. She was in a calm situation though, unlike the pb who was rushing at the smaller dog .Shih Tzus are even more 'different' shape wise. Stupid irresponsible owner who failed to protect her dog, meanig the pb of course. Tragic for all concerned.