> until now I'd not realised how many aggressive dogs run off lead
Strictly speaking (in terms of Canine language and interaction) This is not so much a case of 'Aggression' but more a case of 'socialisation' (and lack there of)
Putting it another way, here's an analogy:
I've asked you to meet a very important foreign client for me. It's really short notice I'm held up in traffic with a bad mobile connection so can't brief you about him but tell you not worry (as you know nothing of his country or his language) Because he will have a translator.
When you are ushered into his office you're desperate to befriend him and give the impression we are an honest trustworthy, friendly business so you ensure you hold direct eye contact with him (you remember something about how liars cant make eye contact) Immediately he seems wary of you (you just get 'that' vibe)
You are invited to sit and the translator informs you he would like to know if you will take tea? you politely smile and accept and when the cup is passed to you, you raise your left hand to receive it. (you get even more bad vibes he seems to have raised his eyebrows at you and comments to the translator who does not translate what has been said)
You start to get quite nervous now! You know you have been perfectly polite... what can he possibly be bristling about!? The more nervous you get (as he regards you even more warily) you start, subconsciously to shift nervously you cross your legs and flex your foot.
With that he explodes! out of the blue, full on hissy fit screeching at the translator and storms from the room!
I walk in and ask you "what on earth did you say!!!?"
You know you said nothing and were to your mind perfectly polite. The translator tells me He found you to be the most brazen and rudest of women!!
As it transpires in 'his' language and culture your direct eye contact was extremely rude and was challenging him (where *you* thought you were being open honest and friendly!) Using your Left hand is extremely rude (stemming from old cultural manners when this hand was traditionally used for 'personal hygiene') and the final insult was that you showed him the sole of your foot again in his culture this is extremely disrespectful!
And so... when our dogs through lack of socialisation do not 'speak' or 'act' in canine... you see the end result!
Great article here by Turid Rugaas
Calming signals - On talking terms with DogsI have been where you are, and can tell you with the right training it can be resolved (15 month Siberian Husky locked in a shed since puppyhood and no interaction with other dogs or ever walked!) I had a snarling, rearing, bratty husky from hell ;-) I now have a very well mannered dog a total difference and a joy to be around for any that meet him :-) My trainer (APBT accredited) was like minded and our ethos was
'set him up to succeed' We only moved on to off lead interaction once we were all happy and he was consitently choosing the appropriate behavior
himself We used 'stooge' dogs and controlled exercises as set by our trainer ( walking round a 'strange' which was a dog the trainer had chosen as it was good at giving off correct body language and the 'calming signals' mentioned in the article I've linked to. lots of exercises done before we even got to go up to the dog and 'meet and greet' and only when we got consistent behavior with lots of different stooge dogs did we move on to off lead meetings and only when we all agreed we were 'setting him up to succeed' ;O)
If you have reservations about your trainer suggestions could this be that you have doubt because you have not yet witnessed this consistency in your dog? if this is the case then yes your right and more work is needed otherwise you will blow all your hard work if it all goes to pot and you have not 'set him up to succeed' ;-)
Hope this helps?
(Sorry, I'll pass you a cuppa... you'll have been here a while reading that War&Peace!!! lol)