Just anecdotally
There is a dog around here that the owners let off into the road in the evenings instead of taking them out for a walk (I'm in Portugal, please dont suggest talking to them or the authorities
)
Salty and her were / are boisterously friendly, she very dominant but Salty has his fuse too, and had her begging on her back a few times - with no actual violence, just barks being worse than bites.
Then I got bored of salty eating crap of off the road so I tried a muzzle (I had got to stop him hoovering crabs etc on the beach) to stop it
But, with this muzzle when he and this Ridgeback met he got very agitated and started being more aggressive perhaps as she was being more aggressive as she know he couldnt snap back? I am never 100% relaxed when they meet anyway, but I started to get a bit nervous.
Anyway, I stopped using the muzzle and they were straight back to being friends
Not a very scientific test, but I never used the muzzle again
He licked a big toad the other day and was vomiting for ages.
Cant win