If your going to go the behaviourist route. Speak to a few different ones. If you put 4 of them in a room with the same question they will all have a different idea. So you need to find one you can work with and who's ideas you agree or could agree with.

thanks everyone for the help ill have a look around the websites and find some books, see if i can help her first before seeing a behaviourist

I'm not to sure why or where the aggresions come through! i got her from about 10 weeks old, did lots of training, socialising puppy classes, had lots of doggy friends as shes grown up.

we moved house around a year ago (if im right in thinking) this is where her welcome barking started! She would run up to another with one or two friendly barks, then got a bit more aggresive barking over the months.

Now if a dog jumps out on her from round a corner etc shell quite happily say hello really friendly (she doesn't have the chance to have a growl and bark)

Shes had a protective moment before but shes never been attacked by a dog (that i know of)

i just miss being able to go for nice walks, now i dread them

Although this is absolutely true, it feels me with horror because it just should not be this way. If I had a dog suffering a problem, I could not only knock on 4 different doors or go to four different forums etc, but I would actually be given advice!! If I wanted to build a house and went and knocked on four different doors or consulted 4 different forums I would probably be told to get a registered builder. Behaviourists should also be registered by a good governing body, not one that is only interested in making money, or one that only takes behaviourists that have published books etc etc.
If a behaviourist has studied scientific principles and up to date methods and knowledge they should all have same understanding - sadly this is far from the truth and many are still practising dominance (pack leader) methods which is so out of date, rather than upto! Thats just one example! Giving advice on the internet without ever seeing the dog in question and owner/family also is worrying - one size does not fit all, whilst we may help a little over the internet I would not want to try to cure a problem such as dog aggression without taking a full history and seeing dog and owners personally.

Gill