I am very interested in reading all the comments in this thread. So far, I've read: no prong collars, no martingales, no rolled collars, no slip leads, no gentle leaders, no flat collars, no web collars. That is a lot of "no's." Where are the yes's? I have had good luck with Luna using a martingale sometimes, a head collar sometimes, a slip lead sometimes, a regular lead sometimes, and intend to start e-collar training this week with the excellent professional trainer we have worked with since she was 11 weeks old so she can be off leash and still safe. She is very well trained for a one-year old puppy knowing sit, down, stay, come, jump, through (a tunnel), place, as well as several tricks. We work together a great deal every day and she also goes to day care a few times a week where she loves socializing with the other dogs. She loves children. We go to shopping malls, home depot, shops where she is welcome, etc. She is a happy, loving, well-socialized girl. Her main problem (and it is a big one) is aggressive herding and protection whenever anyone comes to the house. She is wonderful in other people's homes but in her own home she is a terror to visitors. I've tried tossing treats, crating (where she continues to bark and growl non-stop), putting her outside where she barks at the door, strong "no" correction which she ignores, ignoring the behavior (but she never gives up), squirt bottle, having guests give her treats, having guests ignore her (but again she never gives up barking at them). It's getting so I'm not sure anyone will ever want to come to my house. I will NOT give up and intend to figure this out with her. Hoping that e-collar training can get her attention back on me in this kind of situation so she can deescalate more easily. Any suggestions would be greatly appreciated.