Listen adam with dogs s**t always going to happen....and it 99%down to handler...as much as we would like to blame it on the dog or other parties.....but ignore all the negativity
posted, try to take the positive from this, this is why you obviously posted, you want viewpoints, not slating!!!!!
The dog wasn't properly broke, my method....."dog used to walking on lead, when he/she hears the click of the fastener they know they off the lead, this is the learning zone! Fasten 10ft of cord around collar and then around your hand, unclip lead from collar,the dogs furthest limit is now only 10 ft