ok guys, my one year old rottie has dog aggression (big time). I contacted a trainer and we started home training last week. I prefer a group class, but he can't be around dogs so the trainer thinks we need to do six sessions of home training before the group obedience. Anyway were now working on obedience which he's great at, no problem there. We're gunna work with his dog aggression in 2wks and the trainer said that he might use "remote shock collar" if he doesn't listen to commands! I just need some input on this, is it a good idea? I mean I think his aggression is comming from fear since he hasn't been around dogs. I've socialized him with people, but I forgot about dogs!! Should't we try to introduce him to some dogs before using the "shock collar"? I introduced him to 2 of our friends' dogs and he did great with them after 10 minutes of barking that is...but he's still very aggressive towards strange dogs..So is "shock collar" a good idea?