Honest answer, I do not know.

However, there are always the laws of common sense.

Unfortunately common sense is becoming a very rare commodity, especially in the modern litigious world. :( Probably best to assume nobody else has it and not put yourself and your dog in risky situations.

Sorry, I'm still not clear, was it attacking your dog or playing too roughly for your taste?  How was your dog viewing it?

Had I not got the young staff off him rapid, I think one of them was going to get bitten, that is my common sense talking.

My dog is very slow to anger, but he seemed overwhelmed by the sheer volume of dogs around him.

One of them being over-enthusiastic isn't exactly a marauding pack, though. Emotive tabloid language doesn't give a clear picture I'm afraid.

While it was the staff that was the main aggressor, my dog did not like being surrounded by the rest of the pack, why is it so hard to get that message over?

On-lead dogs are generally uncomfortable when others are off-lead. In fact it's often (not that this happened in your case) that the on-lead dog is the one to first 'have a go' because its use of body language is restricted (our family dog when I was a child was just like that; attack was his idea of defence :rolleyes: When let off the lead there was much less trouble). Luckily your dog didn't do this, and also the other dog wasn't serious enough to cause any damage. Even a single serious snap can result in stitches being needed.

Mine does not like being surrounded by too many dogs either but I don't really see that as attacking her in itself, I'm not sure she does either :)

Her dogs are not MY resposiblity, that is my entire point, however, you seem determined to take an obtuse view of this, I am sorry, but that is how you are coming over.

I don't think I have said anything in defense of her failure to prevent her dogs swamping yours but these things happen and our reactions have to be in proportion.  Personally, even if it was legal, I don't think dogs that are naughty but not nasty deserve being pepper sprayed. 
Reading through your previous posts I think I can understand why you worry about your own dogs reactions but from what you say he did keep his composure and I think rather than stress out about things that may never happen and arming yourself you should take his lead (no pun intended :)) and relax about it for both your sakes :)

"While it was the staff that was the main aggressor, my dog did not like being surrounded by the rest of the pack, why is it so hard to get that message over? "

I don't know Cain.  I'm with you on this.  The woman should have recalled her dogs as soon as she saw they were giving you a problem.  Ideally, I don't think she should have been walking that many in one go anyway as she would have no hope of controlling them in a nasty situation.  However friendly a group of dogs may be, it can be very intimidating to see them all heading for and surrounding your dog.

At last, some common sense prevails.

x

A stout walking stick is much more accurate and is legal! ;)

See, quite a sensible suggestion, and it appears that you have some empathy with what we were faced with.

Thank you.

x

Much better.  Dogs understand sticks too, often merely showing it to them is enough to make them think twice and if it has to be used and the other owners legs take a knock or two, well, it's nothing but bruises :)

To Cain and all the other posters who have similar experiences: you have just witnessed at first hand the typical behaviour of the common 'Dog Luvver'.

You know them, they're the ones who 'luv' their dogs so much they think disciplining them is cruel, that giving them sweeties and chocolate is fun and that only nasty or sick people (or dogs) don't enjoy the unfettered attentions of their 'babies'. If you're still having problems recognising the species, tune in to IMORTD, Dog Borstal or any similar programmes and you'll probably see a few prize examples.

These people must not be confused with People Who Love Dogs any more than churchgoers should be confused with Christians.  

Well said

If they have kids, they are probably horrible too! :D