This thread is very interesting because Duke is becoming a nightmare when walking, he,s 4 months old. We use a harness and a collar, reason being he does back flips and the collar helps me to control him when he,s excited, but upon reading this thread i don,t think the harness is doing him any good with the pulling and the excitedness when he goes into a flip, he usually does this when he see,s a leaf or a person walking in the other direction or it can be a tree. I must say that he is very well behaved at home and he sits very well at the roads, only to lunge forwards after i say its ok to go on. We do the sit and wait for a few minutes also to calm the behavour. I wonder if i should buy a half choke collar to check him? Any help would be appreciated.