I have just caught up with this - had been feeling a bit poorly for a few days and haven't been on as much!
Firstly if I had been at all concerned about taking Honey into this situation, I wouldn't have taken her there.
Secondly if it was necessary to muzzle a dog before taking it into a social situation, then I would have serious doubts about the judgement of the owner in the first place. A social gathering such as the one I was talking about would not be the place to be socialising a fearful dog. I would imagine that would increase the dogs anxiety and lead to further problems.
In my post I was curious to why this had happened around this certain person, despite him having done all the right things to befriend her. I was not concerned about her reaction overly (more embarassed), nor was anyone there particularly. Everyone found this cheeky little cocker spaniel trying to throw her weight around quite amusing - as it was, taken in context. There was no threat to anyone. She was barking - no snapping, no snarling, no biting. I am not aware of the use of muzzling as an anti-bark technique.
We had 2 dogs at home that used to fight - and I mean fight! We were advised to muzzle and it made things much, much worse. I would be very concerned about the use of a muzzle in anything other than a last resort.
Interestingly, I was reading a book - "Animals in Translation" - written by Dr.Temple Grandin (an animal behaviourist who is also on the autistic spectrum). I had mentioned her recently in another thread. She gives great insight into animal behaviour and the kind of things that spook them that most of us would not even think about. She tells a story of a dog who was upstairs with its owner. It heard the little boy of the house coming up the stairs and was really excited. As he approached the room the dog got more excited, assuming that the dog recognised the footsteps and smell of the boy. However when he entered the room the dog started barking ferociously at him, because he was dressed up as a skeleton to go "trick or treating" for hallowe'en. Now it probably seems that the dog did not like the costume - but how would a dog know to not like a costume. Her theory is that dogs are often confused by the different inputs their senses are giving them. The dog heard the footsteps of the boy, he smelt the boy - but the visual input told him it was not the boy - it didn't look like him. This led the dog to be confused and frightened hence the reaction.
According to her (and other specialists in dog behaviour would agree), we spend to much time "humanising" dog behaviour. A lot of us would assume that the dog was frightened of the skeleton costume - humans may be, but most dogs would have no experience to tell them to be frightened of a skeleton itself. It is the confused sensory information the dog receives that is telling it that.
The point that I am trying to make is that the reason Honey could have been so confused by this couple was that they sounded like people, they looked like people, but they smelt like dogs. Thus leading to a confused and frightend dog.
It all sounds so obvious that it seems silly when written down and you almost think to yourself that you knew that all along - whereas most of us if honest would have thought the costume spooked the dog. WHich in a way it did but probably for a different reason than we might have assumed.
Sorry I am rambling now - just thought it was interesting