I don't think Rotties are Fierce,any dog whether it be a JR or a Rottie has the potential to kill,we need better tighter legislation that legislates for ALL BREEDS & making owners accountable for there dogs actions.
I'm talking about if any dog was to attack it,It has no way of defending itself if it's muzzled.
Dogs that are Dog Aggressive are not necessarily aggressive towards humans,the two do not go hand in hand.

im talking about any breed that shows any kind of aggression towards humans or other animals

yep i agree, at the end of the day owners are responsible for their own dogs, if the cant look after them and train them properly then they arent fit to have them in the first place and should be prosecuted.

My bitch is ok with some dogs others she hates with a passion.She has been well trained & socialised since a young puppy.
Take for example what happened to her,walking back from our walk,a loose JR run towards her & attacked her,no owner in sight,now if she was muzzled there is noway she could have defended herself.

I have her under control on-lead at all times,I know she won't tolerate some dogs,but if my dog is under control on-lead I see no reason to muzzle her.I shout to other owners if there dogs are loose to put them on-lead.Most of them have poorly trained dogs with no recall.
We have had many close scrapes - which none have been our fault.If dogs are trained correctly and kept under proper control they don't need muzzles.

i agree with you that they should be on a lead but as far as im concerned you could have the nicest dog in the world but if it has or has had a tendancy to go for other animals....muzzle it

But Why if they are under proper control?

Staffords are well known not to tolerate other dogs,it's part of the breed & history.I won't muzzle my bitch because she dislikes some other dogs.It doesn't make me irresponsible.The irresponsible ones are those who have off lead dogs with no recall, which by all accounts are poorly trained .ALL dogs should have reliable recall before been allowed off-lead.

all im saying is...if im out with my dog and you come along with your dog 'on a lead' and it goes for my dog (on a lead) then your dog should be muzzled, simple as that

She wouldn't be allowed to do that,as she is under proper control all the time.As I said,she dislikes some, others she's ok with.She's usually fine unless the other dog challenges her,or is aggressive towards her. I can read her body language and I act accordingly.

i think on this one we are just gonna have to agree to disagree... what i will say is i breed dogs and strive to make them good, obediant pets. if they ever went or showed aggression toward another dog i would muzzle them.
i think we should end this here, we are never gonna agree on this subject

Animal aggression in dogs is a tricky one. I have socialised my dog from a pup with other dogs from a pup to try and prevent this and so far so good. However you can have a dog that is not at all animal agressive but he only has to have a minor tiff in a park with another dog and it can change his attitude towards other dogs. I've seen this before but luckily not in my dogs.

I always put my dog on a lead when in a park if children are around. Ok I trust my dog with children but I shoudln't expect other parents to so I do it out of respect for them and think all dog owners should regardless of how your dog is around children. I think a good solution would be to have dog parks like they do in the States.