My 12 half week gsd puppy barks when she is leaving other dogs that she has just met  why is this I haven't had a puppy do this before

She was having fun and doesn't want to leave I expect. Get her to focus on you with a treat .Make yourself the best person to be with .The watch me command is good for this and getting your dog to focus on you will be useful as you get further into training her. Lots of treats as you walk away and only guve the treat when she looks towards you even if for a second.dont treat when she is barking either

Pretty typical for my breed, they tend to be noisy greeters, which sadly some owners may misunderstand for some reason assuming barking is aggression.

I think currently a lot of new dog owners seem oblivious to dogs behaviour.  We see lots carrying their dogs all around the woods and common,young dogs. Also if their dog is approached by another dog be it on a lead or not they pull the dog close to them,or pick it up or hide behind a tree! This one couple did this several times with their new puppy. They didn't like other dogs barking or sniffing said puppy. A lot of people with children seem to cling onto their children if a dog passes them! Are we seeing a too cosseted  society of dogs and children? We always socialised our puppy and moved on after a short positive meet n greet to dogs. We put him on a lead if we see another dog approaching on lead (I don't know why their dog is on a lead but I respect it and act) sometimes they say oh can they say hello? They sniff,wag tail and we go (the dogs not owners!)

>I think currently a lot of new dog owners seem oblivious to dogs behaviour.  We see lots carrying their dogs all around the woods and common,young dogs. Also if their dog is approached by another dog be it on a lead or not they pull the dog close to them,or pick it up or hide behind a tree! This one couple did this several times with their new puppy. They didn't like other dogs barking or sniffing said puppy. A lot of people with children seem to cling onto their children if a dog passes them! Are we seeing a too cosseted  society of dogs and children?

It's exactly this that now means my dogs don't go off lead where 20 years ago they did, they and other dogs were a lot better socialised with their own kind so fewer issues and frustrations.

This has coincided with the over representation of dog types (especially in cities) that are not always social/over dominant with their own kind, and sometimes actually encouraged to be like this by certain types of owner.

Why thou is it like this? What's changed to make people think and behave this way?

One simple word 'anthropomorphism' on one hand, and the general disassociation we have with livestock/nature, and the surge in badly owned 'macho' breeds.

Dogs rarely get a chance to truly socialise and learn to be dogs, and so many have come from poor background taken from mother too soon to learn canine etiquette, and bad temperaments bred from.

In the past many people would have no compunction to put to sleep an aggressive dog, unwanted pups, etc.

Most people actually walked their dogs as opposed to drove somewhere to exercise them, so dogs had the edge taken off them long before they got to be loose.  With less car traffic dogs were safer off lead in more areas..

Amd the rise of so called status dogs often sadly used to be agression to back up uneducated attitudes that to make you appear the boss to other humans u need s an agressive dog.i  sure this is more prevent in our larger towns and cities but is a reall problem meet so many who seem to think it's good  to have a dog that can't mix with other dogs or humans and then they have them off lead as well !!!!

Oh don't!    I had my 7 year old Whippet to the vet this morning and everytime a dog came into the waiting area, it was yap, yap, yap.   I had to walk out into another reception area with her in the end.   It's probably, almost certainly, my fault because she really doesn't tolerate other dogs, despite living with her Basset buddie with no worries.   I think a lot of it has to do with when I took her back to see her breeder at around 5 months.   She let her brother out and he chased her all over her acre garden trying to mount her.   She was scared stiff - her breeder thought it highly amusing!  I don't think she ever forgot that early experience which has left her the way she is now.   Could be partly her temperament of course.

Message to you - the more exposure to other dogs you can give your puppy, avoiding what happened to mine as a puppy, the better.  As I should have done this morning, try to have a pocket full of treats to keep her attention on you.   Talking to reception this morning, I suggested I went in and sat there with her on a regular basis, but at 7 years?   Would it all be too late.   It doesn't do her any favours to be yapping and growling at other dogs for sure

ps   She was in to have her corn sorted out and stood on the table while he debrided it without any bad reaction at all.   She's fine with people!

Mamabas, I think you are quite right about a one off situation scaring a dog for life.
My last GR enjoyed playing with other dogs, especially a good game of chase where she was the one being chased. When she was a little over a year old, she met up with a lurcher who was more then happy to chase her, except he didn't quite get the rules of the game. He chased her very hard, growling like mad as is a lurchers way, and it frightened her to death. She couldn't outrun him as he was much faster, nor was he obeying his owners, too caught up in the chase. Eventually we managed to rescue her, but she was never the same again with other dogs and became quite difficult, needing to be kept on a lead unless I found a dog free area with good views so I could see anyone coming.
A more confident dog may not have been so badly affected by a one off episode. My current dog is far more confident and sure of herself and on a couple of occasions she has been chased in a similar way by a lurcher, has the sense to stop dead defusing the chase. She certainly seems to shrug off any 'bad' incidents that have come her way just being a bit more careful who she plays with.

Raine had a similar incident with being chased.  She was ok with other dogs but not too well socialised as a young pup, but she played nicely.  Then an aggressive whippet chased her all the way from me back to the car, and it took me 3-4 years to get her over it.  Whereas Paige could be chased and not give a monkeys.

Linc on the other hand is a chaser, and would very easily be one of those dogs that caused a lifelong fear so I worked ruddy hard to teach him a 'no chasing' cue to prevent that from happening.  Unfortunately, too many people these days just don't bother and let their dogs do whatever - like that whippet.  Those people knew he was a problem dog, they could see something was about to happen and made no attempt to prevent it or interrupt it, or check that Rai was ok when I got her back.

Thanks for the 'reassuring' responses to what happened with my Whippet when she was young.   I felt terrible yesterday and in truth, people did start to glare at me over what she was doing - something I'd NEVER had happen before, with my Bassets.   I know it's not going to help her any (but at 7 years?) but I think I'm probably going to have to leave her in the car until the vet calls us in next time.   Having been 'with Basset' for a loooong time, this is a new and not pleasant experience for me.   I have always felt the luv, when out with the others!   I love her, and otherwise she's a very sweet gentle person, but the impression in the vet's waiting room yesterday suggested something quite different. 

I just find it strange that she doesn't bark when she sees them she just sits down and waits for them to reach her then is quite happy sniffing and trying to play but the minute they turn their back on her to go on their way she barks she doesn't do it to my other 2 dogs when they go out and she doesn't she just watches from the window but as I said she is now 13 weeks so hopefully she will stop as she matures but thanks for the comments  but on the matter of your dog I rescued a 5 year rough collie 6 year ago and she was a kennel kept dog and she was petrified of every noise she heard if you dropped a spoon near her she coward at the top of the house for hours if you put the oven,kettle microwave anything she bolted attacked any dog she went near outside you had to let her walk slightly behind you because the noise of you walking behind her petrified her it took me over 12 months to say wow look at her now she ended up the most laid back well behaved dog she was still able to put other dogs in their place if she needed to but not excessively as before so It is possible to teach an old dog new tricks as they say in some cases sadly she died 8 month ago but she was a pleasure. to own